An exquisite openwork pansy brooch in 18K yellow gold topped with platinum. The portions representing the outer edges of the petals are set with 48 rose cut and table cut diamonds (averaging J color and ranging from SI2 to I2 clarity), while the flower is centered with a half-carat old European cut diamond (J/SI2) in a bezel mounting. The pin has an overall sparkly appearance and looks stunning against dark fabric...

A lovely Art Nouveau 14K yellow gold ring set with an oval brilliant-cut citrine. The setting is particularly elegant. The stone is flanked on either side by a golden fuschia blossom. The citrine is of the very best quality, with extremely saturated orangey-gold color and exceptional brilliance. The interior of the shank is stamped 585 for 14K.

Origin: Continental Europe, ca. 1900. Condition: excellent, sharp detail. Finger Size: 6-3/4. Weight: 5.7 grams...

A handsome pair of classic Art Deco double-sided 14K yellow gold cufflinks, the faces enhanced with engine-turned engraving and opaque navy blue champlevé enamel bands. The connectors stamped with the maker’s mark for Irving Heidelscheimer (Newark, NJ).

Origin: America, ca. 1920. Condition: excellent, no enamel damage. Dimensions: 9/16†diameter. Weight: 5.7 gr.

A nice, heavy pair of 14K gold cufflinks, the faces constructed as ornately interlocking square knots worked in both yellow and rose gold. The baton backs repeat the color theme. The cufflinks are marked “14K”.

Origin: America, ca. 1935. Condition: excellent. Dimensions: front faces, 1/2” x 9/16”. Weight: 12.6 gr.

A fine large-size enameled 14K yellow gold Art Nouveau flower pin the form of a pansy. The petals are beautifully decorated with purple, violet cream and yellow opaque enamels. The enamel has a soft luster that mimics the velvety texture of an actual pansy. The flower is centered with a 15-point round brilliant diamond of exceptionally good quality (E color, VVS2 clarity)...

A handsome man’s 14 yellow gold ring set with a large bloodstone tablet. The dramatically tapered shank is engraved on either side of the stone with a stylized papyrus motif. The bloodstone has a slightly lighter than usual greenish tint that contrasts nicely with its red markings. The interior of the shank is stamped “14Kâ€.

Origin: America, ca. 1920. Condition: excellent, all original. Dimensions: crown, 13/16†x 3/4"; shank tapers from 13/16†to 1/8â€...

A large 15K yellow gold locket, the front cover decorated with an applied floral motif. The flower’s petals are set with Persian turquoise cabochons while the leaves are set with seed pearls. The pearls and turquoise are of good quality, with bright coloring that enhances the dramatic appeal of this large locket. Tested and guaranteed 15K.

Origin: England, ca. 1870. Condition: excellent, interior frame intact. Dimensions: 1-3/8” x 1-5/8” (excluding bail). Weight: 18.0 gr.

An elegant Art Nouveau 14K yellow gold locket, the cover decorated with repousse decoration of a young woman wearing a diamond-set diadem and flowers in her hair encircled in a laurel wreath. The quality of workmanship is excellent. The old European cut diamond add a perfect touch of sparkle. The interior retains both of its original frames and glass covers. The front side of the interior also contains a fragment of alabaster with carving...

A very nice Victorian 15K yellow gold ring featuring three beautifully colored spessartite garnets separated by rows of seed pearls. These garnets are not the typical murky reddish stones, but brighter orangey-red with nice fire. The gold surfaces are elegantly engraved in a floral motif that goes all the way around the shank. The ring was expertly sized at some point, keeping the hallmarks intact, and with matching engraving. Fully hallmarked for Birmingham, 1868.

Origin: England, 1868...

A 14K white gold ring set with a .77-carat round brilliant-cut diamond (I color, SI2 clarity, VG cut) surrounded by a horseshoe motif set with .25 carats of rose cut diamonds over a pierced gallery. Tested and guaranteed 14K.

Origin: America, ca. 1940. Finger Size: 5-3/4. Dimensions: crown, 1/2" x 5/8". Weight: 4.2 grams. Approximate Total Diamond Weight: featured stone, .77 ct; mine cuts, .25 ct.

A 14K white gold pendant featuring a prong-set 1.04 carat diamond (H/I1). The diamond has very good cut and brilliance. The pendant is accompanied by an 18-3/4" white gold chain.

A lovely 18K yellow gold bracelet designed as floral plaques separated by bezel set blue sapphire cabochons. Each elegantly pierced gold plaque depicts a rose encircled by scrolls and flanked by additional flowers. The backs of the plaques are engraved in a matching motif. The high-domed cabochons have fine deep blue coloring and show no indications of heat treatment. The clasp is stamped with French 18K marks.

• Origin: France, ca...

A fine 18K yellow gold Sputnik ring by H Stern. The dome is bezel-set with nineteen round citrines, amethysts, pink and green tourmalines, garnets and aquamarines. This design was created in the 1950s to highlight the range of colored gemstones available from Stern’s Brazilian mines. It came to be called “Sputnik” because of its resemblance to the spike Soviet satellite launched in 1957...

A very handsome pair of 18K yellow gold double-sided cufflinks, the faces simply set with round brilliant cut citrines. The prongs holding the stones are reeded for an added a touch of elegance. The citrines have good, deep lemon color with just a hint of orange, have excellent brilliance, and are well-matched. Despite the simplicity of the design, the cufflinks are heavy and feel substantial when being worn. They’re particularly attractive on a blue cuff. The connectors are stamped...

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 s...

An outstanding pair of heavy French Art Deco 18K yellow and white gold cufflinks set with cabochon garnets. Each of the faces comprises a set of three gold discs—two yellow and one white—stacked and offset to one side. The upper discs are pierced by a bright cabochon garnet. The design has a severe, almost industrial modernist, look that was surely very unusual in its time. The backs are stamped with French 18K marks and the master goldsmith’s mark for Paul Marteau. Mar...

A handsome pair of18K white gold cufflinks featuring flat discs of richly colored synthetic blue spinel. The “Spinel Disc” design is from Longmire’s “Contemporary 18K” line. The simple design and vibrant color has a very 1960s feel about it. The cufflinks are finished with toggle backs. Each is stamped with 18K hallmarks and with Longmire’s maker’s mark. The cufflinks are currently available from Longmire’s London boutique for $2200.

Origin: England, ca. 2015. Condition: ...

A heavy Retro bracelet in 14K yellow gold set with amethysts by Tiffany & Co. The bracelet is designed as large arched links, each centered by rectangular step-cut amethyst. The stones have vivid violet coloring and excellent brilliance, without the color zoning that sometimes mars amethysts. The clasp is stamped Tiffany & Co. The bracelet is presented in its original leather and silk box.

Origin: America, ca. 1935. Condition: excellent. Dimensions: 21/32†wide; 7†long. Weight...