Kensington House Antiques and Sterling Silver Kensington House
Antiques
All Items : Estate Jewelry : Platinum : Vintage : Pre 1900 item #1082846
Kensington House Antiques
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A superb early Edwardian “style guirlande” platinum, gold, diamond, opal and pearl necklace. The fine platinum chain suspends a platinum and gold pendant centering a beautiful oval opal surrounded by an ornate swagged garland of diamonds punctuated with creamy natural pearls. The opal has strong and even play-of-color with strong flashes of bright green, a bit of blue and pale orange. The single cut and old European diamonds have beautiful color (F-H) and have clarity ranging from SI1 to I1. The center drop is articulated in three places, allowing lots of movement when being worn. The quality of workmanship is very fine, with completely hand-sawed openwork behind the stones, fine millegraining, and precise placement of stones. The back has a heavily worn maker’s mark, but the partial serial number would indicate a quality maker. Tested and guaranteed 14K gold and platinum.

Origin: America, ca. 1890. Condition: excellent, all original except the spring clasp which is 14K white gold instead of platinum. Size: necklace, 18-3/16” long; pendant, 2-7/8”W x 2-1/4”L. Weight: 9.0 gr. Approximate Total Gemstone Weight: opal, 1.01 cts; diamond, 1.61 cts.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1910 item #1212662
Kensington House Antiques
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A very fine round platinum, diamond and pearl brooch depicting a flower in full blossom being visited by a small insect. The flower’s leaves and petals are set with mine-cut diamonds, as are the insect’s wings. The insect’s body is formed from a small natural pearl and pearls also adorn the flower in several places. The delicacy of the design is amazing. The diamonds are very good quality and the pearls have lovely iridescence. The brooch retains its original safety clasp and 18K gold pinstem. The brooch is signed “Tiffany & Co.” and has an engraved inventory number. Tested and guaranteed platinum. This piece could be worn as a pendant simply by passing a fine platinum chain through one of the openings or by adding a folding bail.

Origin: America, ca. 1900. Condition: excellent, all original. Size: 1” diameter. Weight: 4.6 grams. Approximate Total Diamond Weight: .30 carat.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1910 item #1210882
Kensington House Antiques
$3495.00
A fine and very lovely Art Nouveau pendant or brooch worked in platinum and 18K yellow gold, every visible surface is set with old mine cut and old European cut diamonds of various sizes. The design depicts are central flower surrounded by foliage twisted into whiplash curves and sprinkled with flower buds. The construction is very solid and quite heavy, but the openwork maintains a feeling of lightness. The back retains the original pinstem and safety clasp as well as a folding bale so the jewel can be worn as either a brooch or pendant. Tested and guaranteed platinum and 18K.

Origin: America, ca. 1905. Condition: excellent, all original. Size: 1-13/32” x 1-3/32” (excluding bale). Weight: 10.8 grams. Approximate Total Diamond Weight: 1.4 carats.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1910 item #1039982
Kensington House Antiques
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A phenomenal Edwardian platinum and 18K gold brooch/pendant in the form of a caduceus set with 160 old European and old mine cut diamonds weighing approximately 2.90 carats. The principal stone is a square cushion cut, weighs approximately .28 ct, and is F color, VVS2 clarity. The smaller diamonds range F-I color, VS2 to I1 clarity. The diamonds are set in platinum over 18K yellow gold in the traditional French manner. The mounting is of the finest quality, with superb hand-sawn piercing and millegraining. This quality is further reflected in that the tiny portion of the bail that can be seen from the front when worn as a pendant is worked in platinum rather than gold like the remainder of the bail and the pinstem. The staff terminates at the top and bottom with a lustrous, slightly oval natural pearl.

The back of the piece has a pinstem that can be unscrewed and removed for wear as a pendant with the folding bail. The shape of the bail suggests that there was probably an optional comb fitting so that the piece could be worn as a hair ornament. The very finest quality and most expensive jewels of the era sometimes had various fittings so the owner could get as much use from a piece as possible.

The caduceus is the herald's wand carried by the Greek messenger god Hermes (and his Roman counterpart Mercury). It is sometimes topped with spread wings echoing the god's winged sandals. In contemporary usage it is the symbol of the medical profession. This linkage likely stems from the myth of the god Apollo sending Hermes to deliver his half-mortal son Aesculapius from the body of his dead mortal mother as her body was consumed by the fire of her funeral pyre. Aesculapius went on to become a healer and founded the cult of which Hippocrates, the founder of western medicine, was a follower.

Origin: France, ca. 1900. Condition: excellent, all original. Size: 2-3/8" x 2-3/8". Weight: 12.7 grams. Approximate Total Diamond Weight: 2.90 cts.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1920 item #1280850
Kensington House Antiques
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A fine Edwardian platinum and natural saltwater pearl necklace. The strand comprises 72 natural pearls of graduated sizes (3.7 to 5.0 mm) strung between platinum links. The pearls have symmetrical button shape, white body color with cream overtones, and excellent luster. The pearls are well-matched for size and quality throughout the strand. The necklace is finished with replaced 18K white gold clasp.

The necklace is accompanied by a gemological report from the Laboratoire Français de Gemmologie indicating that the pearls are natural saltwater.

Origin: France, ca. 1910. Condition: excellent, replaced clasp as noted. Dimensions: 17-5/8" long. Weight: 10.7 grams.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1920 item #1212584
Kensington House Antiques
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A stunning French Belle Epoque platinum negligee necklace set with old European and single-cut diamond and calibre cut blue sapphires. The fancy platinum chain, interrupted at regular intervals with natural seed pearls, joins to a gracefully arched diamond-set bar suspending old European cut diamonds leading an asymmetrical pair of semicircular plaques, each finished with a tassel of natural seed pearls. The term “negligee”, technically meaning “careless”, refers to the seemingly careless, uneven arrangement of the drop elements. The diamonds are graded as J/K color and I1 clarity. The necklace is stamped with French “tete de chien” marks for platinum.

Origin: France, ca. 1915. Condition: excellent, all original. Size: necklace length, 17-1/2”; pendant drop length, 2-1/4”. Approximate Total Gemstone Weight: diamond, .85 ct; sapphire, .16 ct. Weight: 9.5 grams.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1920 item #1434866
Kensington House Antiques
$1,795.00
A very fine Art Nouveau pendant formed from an exceptionally large natural freshwater pearl mounted in platinum and gold and set with diamonds. The floral platinum mounting features a .15 carat old European diamond and nine single-cut diamonds. The bail is shaped as a clover and is set with three additional diamonds. The pearl has fine luster with rose and green orient. Tested and guaranteed platinum and 14K gold. The contemporary chain is 14K white gold.
  • Origin: America, ca. 1910
  • Condition: excellent
  • Dimensions: pendant, 1-9/16" x 1/2"; chain, 16"
  • Weight: 5.5 grams
  • Approximate Total Diamond Weight: .45 carat
All Items : Estate Jewelry : Platinum : Vintage : Pre 1920 item #1350968
Kensington House Antiques
$3,850.00
An impressive Edwardian pendant featuring a large cabochon amethyst and diamonds set in platinum. The amethyst is pierced and set with a .25ct H/SI1 diamond and surrounded by a halo of small old European cut and rose cut diamonds. The bail is similarly set with rose cut diamonds. The pendant has a very dramatic appeal, yet the openness of the setting keeps it from being overpowering. Tested and guaranteed platinum (chain is silver).

Origin: America, ca. 1915. Dimensions: 1-3/8” diameter (excluding bail). Weight: 13.7 gr. Approximate Total Gemstone Weight: amethyst, 32.75 cts; diamond, 1.25 cts.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1920 item #1039922
Kensington House Antiques
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An exquisite Edwardian pendant and brooch featuring a large oval rubellite (pinkish-red tourmaline) cabochon surrounded by old European cut diamonds mounted in elegant buttercup settings. The diamond flower buds are mounted in an intricately interlaced knife-edge platinum setting. The back has a removable mounting so the piece can be worn as either a brooch or a pendant. Removable mountings of this type are very complex and appear on only the finest pieces from the period. The rubellite has fine color. Rubellites are usually very included, but this stone has far better clarity than most, graded as Type III slightly included. The diamonds range I-J in color and SI1-SI2 in clarity. Tested and guaranteed platinum.

Origin: probably France, ca. 1905. Condition: excellent, all original. Size: Weight: 6.6 grams. Approximate Total Gemstone Weight: diamond, 1.6 cts; rubellite, 5.08 cts.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1920 item #1202854
Kensington House Antiques
$3950.00
A lovely French garland-style pendant/brooch in platinum and set with diamonds. The garland style, popularized by Cartier, heavily borrowed Louis XVI motifs such as bows, ribbons and laurel wreaths—all seen in this example. When worked in platinum, the designs take on a delicate appearance and allow the diamonds to shine. The center old European cut diamond, graded as J/SI1, weighs .48 carat. The diamond hanging from an articulated millegrained knife-edge mounting has the same grading and weighs .35 carat. The smaller diamonds are a mix of antique cushion, rose and Swiss cuts. This piece has two small loops at the top of the back so it can be worn from a fine platinum chain. When worn as a pendant, the 18K gold brooch fitting can be unscrewed and removed entirely. Convertible fittings such as this were difficult to make and always signaled a piece of high quality. The hallmarks allow the pendant/brooch to be definitively dated prior to 1912.

Origin: France, ca. 1910. Condition: excellent, all original. Size: 1-11/16” x 1-9/16”. Weight: 10.8 grams. Approximate Total Diamond Weight: 2.15 carats.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1920 item #1235052
Kensington House Antiques
$12,950.00
A large Edwardian puffed heart pendant/brooch worked in finely pierced platinum and set with nearly six carats of old European cut diamonds. Most Edwardian hearts are somewhat smaller than this generously-sized example. The design depicts a central blossom surrounded by scrolls around the edge of the heart. The center diamond is .60 carat, L color and SI2 clarity. The remaining 36 diamonds, totaling approximately 5.27 carats, are I/J color and SI1-I1 clarity. The back of the heart has a removable 14K yellow gold brooch fitting, as well as a platinum folding bail, so the piece can be worth as either a pendant or brooch. This fitting is very distinctive, and we have see puffed heart brooches of this sort signed Tiffany & Co. Tested and guaranteed platinum.

Origin: America, ca. 1910. Condition: excellent, all original. Dimensions: 35 x 35 mm (1-3/8 x 1-3/8 in). Weight: 21.2 gr. Approximate Total Diamond Weight: 5.87 cts.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1930 item #1334050
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An elegant Art Deco platinum filigree ring centered by a .70 old European cut diamond mounted in an octagonal surround of caliber cut synthetic sapphires (typical of genuine Art Deco period rings). The platinum setting is beautifully pierced at the front and the shank is engraved in a foliate pattern completely around. The diamond is graded as G/H color and VVS1 clarity, and has excellent cut with fine brilliance. The sapphires are bright and provide a nice pop of color. The interior of the shank is engraved with a pair of monograms and the date 2/19/27.

Origin: America, 1927. Condition: excellent, sharp detail. Dimensions: crown, 7/16” diameter. Finger Size: 6-1/4. Weight: 3.2 gr. Approximate Total Diamond Weight: .70 ct.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1930 item #1320705
Kensington House Antiques
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A stunning Art Deco platinum bracelet, the links arranged in a zigzag pattern of bead-set round diamonds and channel-set square rubies. The overall design has the beautifully graphic, geometric appeal of the best French Art Deco jewels. The diamonds average VS clarity and G/H color. The rubies are similar quality, with medium dark, vivid red color (R6/6) and eye-clean clarity. The bracelet is masterfully constructed so it lies flat against the wrist and the links are individually hinged to provide movement that accents the glittery jewels. The bracelet is completed with its original hidden box clasp. The clasp is stamped with French 18K gold (for the clasp tongue and spring mechanism) and platinum (remainder of the bracelet) marks and with a partially worn master goldsmith’s mark. The bracelet was acquired from the collection of a Parisian lady who owned many pieces of superb quality from major houses such as Cartier, Perrin, and Boucheron.

Origin: France, ca. 1925. Condition: excellent; all original. Dimensions: 7/16†wide; 7-3/8†long. Weight: 45.5 gr. Approximate Total Gemstone Weight: ruby, 14.91 cts; diamond, 4.20 cts.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1930 item #1338395
Kensington House Antiques
$24,500.00
A stunning Art Deco platinum ring featuring an antique cushion cut 9.03-carat Ceylon sapphire flanked on either side by three baguette diamonds arranged in a stepped pattern. The sapphire is graded on the GIA scale as vB5/4 (medium tone, moderate-strong saturation, violetish blue color), with eye-clean clarity and excellent cut. The stone's internal characteristics suggest Ceylon as the most likely origin. The overall look is a lovely cornflower blue with a tinge of violet mixed in. The stone is brilliant and easily stands up to the side diamonds, graded as F/VS1. The shank is stamped with French hallmarks for platinum and for 18K (the prongs holding the sapphire are 18K white gold). The interior of the shank is stamped with a serial number and a maker's signature that is now obscured. A stone of this size and quality, complete with a serial number, would suggest a major Parisian house as the maker.

Origin: France, ca. 1920. Condition: excellent; the shank is in very good condition; minute scattered facet junction wear on the sapphire. Dimensions: crown, 11/16" x 1/2". Finger Size: 6-1/4. Weight: 5.7 gr. Approximate Total Gemstone Weight: sapphire, 9.03 cts; diamond, .60 ct.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1930 item #1019581
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A superb Art Deco platinum ring set with a cat’s-eye chrysoberyl cabochon flanked at each shoulder by a row of square step-cut diamonds. The chrysoberyl is of the finest quality, with a strong well-centered white eye against a strongly greenish-yellow background—precisely the combination that yields the desirable “milk and honey” effect. The cabochon is nicely cut and has very good symmetry. The diamonds are of exceptional quality, with D/E color and VS2 to SI1 clarity. The platinum mounting has a matte finish that nicely accents the stones. The interior of the shank is marked “Irid Plat”.

Origin: America, ca. 1925. Condition: excellent. Size: crown, 9/16” wide. Finger Size: 6-1/2. Weight: 9.0 grams. Approximate Total Gemstone Weight: chrysoberyl, 4.00 cts; diamond, .468 ct.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1930 item #1038419
Kensington House Antiques
$22,500.00
A phenomenal Edwardian platinum, diamond and amethyst bow brooch by Cartier. Four tromp l'oeil amethyst loops, each surrounded in old European cut diamonds, flank a center 1.08 carat, J/K, VS2 old European cut diamond.

Each of the double loops of the bow appears to be set with two amethysts, but there is in fact only one amethyst on each side. The gemstones are precision-cut to fit perfectly into the platinum setting and give the appearance of being four stones. The amethysts are graded as medium, moderately strong Purple (P5/4) in color, with eye-clean clarity. This is the color and intensity sometimes termed "Siberian".

The 104 old mine cut and rose cut diamonds along the platinum borders total approximately 2.94 carats range from VS2 to SI2 clarity and H-J color.

The platinum setting is beautifully crafted, with a pierced gallery and engraved details around the collet setting of the center stone.

The brooch is hallmarked with the extremely rare master goldsmith's mark used by Cartier for only a three-year period, 1919-1922.

Origin: Paris, France, 1919-1922. Condition: very good, there is a small chip on the inside edge of each amethyst near the junction with the center diamond, visible upon very close inspection in strong raking light (one visible only from the reverse). Size: 3" x 27/32". Weight: 18.7 grams. Approximate Total Gemstone Weight: amethyst, 22.68 carats; diamond, 4.02 carats.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1930 item #1298426
Kensington House Antiques
$1,695.00
A lovely Art Deco white gold and platinum filigree bracelet featuring three diamond-set frosted and engraved crystal plaques alternating with bezel-set pale blue spinels. The use of pale blue spinels the color of aquamarines is a very unusual treatment in a bracelet of this type, and the overall effect is very pretty. All the platinum surfaces are engraved in a delicate foliate motif. The clasp is stamped for 14K and platinum and has an unidentified maker’s mark.

Origin: America, ca. 1920. Condition: excellent, all original. Dimensions: crystal plaques, 9/16” wide; overall length, 8-1/8”. Weight: 10.0 grams. Approximate Total Gemstone Weight: spinel, 1.18 cts; diamond, .08 ct.

All Items : Estate Jewelry : Platinum : Vintage : Pre 1930 item #1307014
Kensington House Antiques
$9,850.00
An exquisite Art Deco platinum pendant in the form of a rose set with old mine cut, old European cut, single cut and pear cut diamonds. The design is delicately worked in a sort of stencil effect, the negative spaces between diamond-set areas appearing as the veins of leaves or the deeper recesses of the rose blossom. The center of the rose is set with a .96-ct pear shaped diamond, H/VVS2. The smaller diamonds are well-matched in the H range SI clarity. A diamond-set leaf-shaped bail completes the design. The mounting is stamped with European platinum marks.

Origin: Europe, possibly Poland, ca. 1925. Condition: excellent. Dimensions: 1-3/4" x 1-3/16". Weight: 9.4 gr. Approximate Total Diamond Weight: 4.6 cts (.96 ct pear).