A colorful pair of 18K gold and gemstone earrings from the “Rainbow Collection” by H Stern. Created in the 1980’s, the collection was intended to show off the variety of colored gemstones available from Stern’s Brazilian mines and also the artistry of the company’s designers in the subtly graduated colors that reproduce the colors of the rainbow spectrum. The selection includes amethyst, several shades of citrine, peridot, and blue topaz...

Vintage 18K yellow gold post-back earrings in the "Scribble" design by Paloma Picasso for Tiffany & Co. The design is sometimes called "Graffiti" or "Squiggle." The earrings were made in various sizes, with this pair being the most delicate and wearable. The backs are dated 1983 and are marked by Tiffany and Picasso.

• Origin: America, ca. 1983
• Excellent condition
• Dimensions: 5/8" x 1-7/16"
• Weight: 4.9 grams

An unusual vintage 14K gold equestrian keychain by Tiffany & Co. The chain has a fob on either end, one in the form of a horseshoe and the other in the form of a fully three-dimensions horse head. The head is nicely detailed and sparkles with a pair of bright ruby eyes. The rubies, though small, have very fine bright color. The back of the horseshoe is marked "Tiffany & Co. 14K."

Keys are added by holding the chain against one side of the horseshoe and slipping on the key...

A classic 14K yellow gold “Tree of Life” pin by Mikimoto. This design is an enduring classic available only from the higher-end Mikimoto boutiques. The pin is set with twelve cultured pearls, ranging in size from 4.01 to 5.18mm. The pearls are of exceptional AA quality, with cream body color and pronounced rose overtones. The luster is very bright and the surfaces are nearly blemish-free. The back is marked 14K and has Mikimoto’s oyster shell signature...

A classic 14K yellow gold “Tree of Life” pin by Mikimoto. This design is an enduring classic available only from the higher-end Mikimoto boutiques. The pin is set with twelve cultured pearls, ranging in size from 3.99 to 5.42mm. The pearls are of exceptional AA quality, with cream body color and pronounced rose overtones. The luster is very bright and the surfaces are nearly blemish-free. The back is marked 14K and has Mikimoto’s oyster shell signature...

An unusual 18K yellow gold pendant in the Sputnik design by H Stern. Most examples of Sputnik jewelry are set with multi-colored gemstones, but occasionally a piece turns up with a single color—in the case amethyst. The design was created in the 1950s to highlight the colored gemstones available from the Stern mines in Brazil. It later earned the nickname “Sputnik” for its resemblance to the spike Soviet satellite launched in 1957. Tested and guaranteed 18K.

Origin: Brazil, ca. 1955...

A colorful 18K gold pendant from H Stern’s “Rainbow Collection,” featuring rectangular garnet, topaz, citrine, peridot, green tourmaline, aquamarine, and amethyst to represent the color spectrum of visible light. The stones are contained within a simple gold border. The reverse is stamped with Stern’s star mark. Tested and guaranteed 18K.

• Origin: Brazil, ca...

An extraordinarily fine antique 18K yellow gold ring by Tiffany & Co. set with a mixed cushion cut Burmese blue sapphire surrounded by old mine cut diamonds. All the gems are of the finest quality. The sapphire has been certified by the American Gemological Laboratories (see the following paragraph). The diamonds, ranging in size from approximately .22 carat to .29 carat each, are estimated at G/H color and SI to VVS2 clarity...

Large snake brooch made by Italian designer Piranesi. 18K black gold setting covered with amethysts, pink tourmaline, two approx 5 pt diamonds for eyes. The combination of these stones gives this brooch an overall stunning color, a real standout.

A fine modernist 18K yellow gold ring by Burle Marx set with an intricately carved amethyst in the "forma livre" (free form) style. Haroldo Burle Marx was particularly known for his use of large gemstones, often fashioned by carving or tumbling rather than faceting, a technique he invented in 1948. The amethyst's deep purple color beautifully contrasts with the gold, which is worked with florentined engraving typical of Marx's pieces. Tested and guaranteed 18K...

A striking 1950s extra-large bracelet charm by Van Cleef & Arpels. The charm is a fully-functional roulette wheel studded along the edge with collet-set round cut sapphires and emeralds. Under crystal dome, a tiny ruby bead serves as the marble. The moveable handle spins the dial, causing the ruby to skip along until if falls into one of the depressions on the wheel. Instead of numbers, however, the wheel is engraved “Je t’aime” (I love you…)/”Un Peu” (…a little)/”Beacoup” ...

Superb Mikimoto brooch in the shape of a harp. The harp’s sounding board is set with a row of ten fine AA pearls graduating from 3.3 to 5.8 millimeters, and the strings are studded with round brilliant-cut diamonds. The neck and column, both worked in gold, are beautifully detailed. The pearls are of exceptional quality with light cream body color and rosé overtones. The luster is very bright and the pearls are well matched. The diamonds are SI1/2 clarity and G/H color. Mikimto figur...

A beautiful and very heavy 18K yellow gold bracelet set with blue sapphires by Tiffany & Co. Each link is designed as a pair of ropetwist arches joined by a prong-set round sapphire. The links are hinged, so the bracelet is flexible and comfortable to wear. The sapphires are medium dark blue with moderately strong saturation, and show no indications of heat treatment. This classic design would look good with a business suit, a cocktail dress or jeans. The box clasp is marked “18” and �...

A fine modernist 18K yellow gold ring by Burle Marx set with an intricately carved amethyst in the “forma livre” (free form) style. Haroldo Burle Marx was particularly known for his use of large gemstones, often fashioned by carving or tumbling rather than faceting, a technique he invented in 1948. The color of the amethyst is deep purple and is nicely even throughout the stone. The gold surfaces are decorated with the fine florentined engraving typical of Marx’s pieces. The interior o...

A rare pair of 18K yellow gold earclips in the Sputnik style by H Stern. The domes are bezel-set with round amethysts, citrines, aquamarines, green and pink tourmalines, and garnets. This design was created in the 1950s to highlight the range of colored gemstones available from the mines of Stern's native Brazil. It later came to be called "Sputnik" for its resemblance to the spiky Soviet satellite launched in 1957. Each piece has a unique appearance that relies on the particularly selection and...

A stunning 19K yellow gold enhancer pendant intended for a thick chain or a strang of beads by Elizabeth Locke. The oval pendant encloses a gorgeous labradorite cabochon glowing with the billowy blue color of the best labradorite. The central stone is accented at compass points by round brilliant-cut blue sapphires. The sapphires have a slightly violet tint and exceptional brilliance. The bail is hinged so the pendant can be slipped over a thick chain or onto a strand of beads or pearls. The...

An extremely rare 18K yellow gold bracelet in the Sputnik design by H Stern. The domes are bezel-set with round amethysts, aquamarines, citrines, green tourmalines, pink tourmalines and garnets. The design was created in the 1950s to showcase the range of colored gemstones available from Stern's mines in Brazil. It later came to be called "Sputnik" because of its resemblance to the spiky Soviet satellite launched in 1957. Each piece has a unique appearance that relies on the particular selec...

A very rare pair of 18K yellow gold and diamond earrings designed by Frank Gehry for Tiffany & Co. These “Hoop” earrings are from the “Equus” line, one of the six original lines Gehry created in 2006. There were two different earring designs in the Equus line, this style being the more uncommon. The earrings are bead-set with round brilliant cut diamonds one side. They can be worn with the diamonds showing outward, or reversed to show the plain gold side. The diamonds are estimated ...