A colorful pair of 14K yellow gold earrings by popular New York jewelry designer Sonia Bitton, whose collections have been sold at Neiman Marcus and Saks Fifth Avenue. The earrings feature round cut amethysts, citrines, peridots, blue zircons, pink tourmalines and garnets, each set in a movable bezel. When being worn, the bezels move freely on their framework, allowing the gems to shimmer. The back are signed “Sonia B” and are marked “14K”.

Origin: America, ca. 2000...

A classic 18K yellow gold link bracelet in the "Atlas" pattern by Tiffany & Co. The design is based on the Roman numerals from the clock over the doorway of Tiffany's NY flagship store. The clasp is signed by Tiffany and is dated 2003. This bracelet is currently available only in white gold and is priced at $3,700.

Origin: Italy, 2003. Condition: excellent, all original. Size: 5/16" wide; 7-1/8 long. Weight: 28.7 gr.

Signed by a listed “middle period” Taxco maestro primarily known for his repousse work, this 1950s carved azur-malachite and sterling “mask” pendant necklace is as stunning as it is unexpected. Dark blues, deep greens and earthy browns add depth and gravity to the stone, making the ancient figure’s features as stern in sleep as they must have been in that life lived centuries ago...

Calling the vintage Mexican silver and black stone "mask" ring I am presenting here massive is not an exaggeration. It is not just the actual ring size (9.5 US) that makes it so; it is also the textured, solid setting, quite masculine in design, and the beautifully carved, stupendous effigy it houses. I am not sure what the stone is - I think it might be onyx but it could also be black agate. I am fascinated by its opaque gravity and the way its satin finish invites the touch...

A stunning 18K white gold and blue sapphire ring from the "Paris Nouvelle Vague" collection launched by Cartier in 1999. The collection was inspired by the dynamism of the City of Paris. The ring is designed as an unending double spiral of white gold with one loop extended into an oval. The band crosses over at the top and is set with a row of eleven vivid pure blue round brilliant-cut sapphires...

An uncommon pair of large "X" earrings by Paloma Picasso for Tiffany & Co. One arm of each earring is worked in platinum and set with round brilliant diamonds (G/VS1). This design is uncommon in the large size and very difficult to find with diamonds. The earrings retain the original posts and omega clips...

An 18K tri-color gold ring in the inconic "Double C" motif by Cartier, with a stack of yellow, white and rose gold bands terminating in yellow gold C's at the opening. The interior is marked with Cartier's signature, the serial number "F95043", and the design date "1997".

Origin: France, ca. 1997

Condition: excellent

Finger Size: 56 European/8 US (can be opened slightly)

Dimensions: band, 1/4" wide; C's, 5/16" wide

Weight: 5.2 grams

A handsome 18K yellow gold ring by Cartier in the "Lanières" design, set with diamonds and rubies. The wide gold band is decorated in an engraved checkerboard pattern, with certain squares filled in with either a brilliant round cut diamond or a round cut ruby. The ring is set with stones on only one side, so it can be turned around and worn as an handsomely geometric wide gold band. The ring can be worn by either a man or woman...

This cool ring is adjustable in size (to size 9). It is sterling silver with 3 abstract flowers buds: turquoise, quartz, onyx, tiger's eye and a red stone -- cabs. The band is marked: TAXCO MEXICO (in a circle) with S?C in the middle. It is also marked with #3 assay mark. The ring is really quite pretty and in excellent condition.

An 18K yellow gold and diamond necklace for the French luxury jeweler Fred of Paris. The design features a series of bar-shaped chain links interrupted by stations collet-set with round brilliant diamonds of G color and VVS2 clarity. The necklace is 16" long and is designed to curve gently around the lower neck. This length is very versatile for either evening or day wear...

Authentic Tiffany 10 Strand Pearl Necklace by Paloma Picasso with 18K yellow gold clasp. Hallmarked on clasp c1982 T & Co, also hallmarked on clasp loop Paloma Picasso. Approximately 900 pearls total. Purchased from Tiffany's, 5th Avenue, New York, absolutely 100% Authentic. Can be worn straight or twisted (see photos). Could also be worn doubled as a bracelet. New, never worn, comes in original Tiffany jewel case box. Will make a nice gift! Length is 17.25 inches (untwisted)

A stunning pair of 18K noble gold and natural fancy-colored diamond earrings from the Snowflake collection by H Stern. Each earring is composed of three snowflakes of graduated size, each set with round brilliant natural fancy-colored diamonds in subtle shades ranging from honey to pale golden brown. The diamonds average VS2 clarity. The earrings are made with 18K noble gold, a color somewhere between white gold and yellow gold that Stern created in 2001...

An 18K yellow gold buckle ring enhanced with enamel in Gucci's trademark Kelly green. The simplicity of the design is classic Gucci. The interior of the shank is signed "Gucci 18" Italy".

Origin: Italy, ca. 1970. Dimensions: shank, 3/16" wide. Finger Size: 6-1/2. Weight: 3.4 grams.

When life hands you lemons, you make lemonade and when it hands you an orphan cuff link, you have it converted into a ring. I have always been very partial to pieces of jewelry that would normally come in pairs but lost their partner over the course of their adventurous life...

A rare pair of 18K yellow gold “Sputnik” earrings by H. Stern. This classic design features a golden dome studded with various colored gemstones including green tourmaline, pink tourmaline, aquamarine, amethyst, citrine and garnet. Each piece of Sputnik jewelry has a unique appearance depending on the combination of gemstones used and how they are arranged relative to one another. This pair of earrings has brightly-colored stones in a very pleasing arrangement...

Authentic Kieselstein Cord 18K yellow gold ring with Foo Dog motif atop rectangular carnelian stone and 4 diamond corner accents...

A magnificent 18K gold, sapphire, emerald and ruby dome ring by David Webb. The textured gold is accented with rows of ropework bands punctuated with collet-set cabochon gemstones. The rich, intense colors of the stones beautifully accent the intricate gold. The extra-wide shank keeps this heavy statement ring from turning on the finger. The interior is signed "Webb 18K."

Origin: America, ca. 1970. Condition: excellent. Dimensions: 15/16" wide, tapering to 5/8" at the back. Finger Size:...

A stunning pair of 18K yellow gold earrings in the "Heliocoidal" pattern by lauded designed Michael Good. The earrings are constructed in the anticlastic raising technique in with the piece is formed from a sheet of gold and then twisted along all three dimensions to create an organic shape that Good refers to as "molten energy." Each piece is created entirely by hand and does not employ any machine made parts such as earwires or clasps. Older examples of Good's jewelry is difficult to find. ...