A very interesting pair of 18K yellow gold double-sided cufflinks by Tiffany & Co. The cufflinks were made in France and were available only in Tiffany’s Paris boutique. Each face is formed as a square knot instead of the more traditional knots often seen in cufflinks. The solid connectors are marked with French 18K hallmarks and also “Tiffany & Co.”

Origin: France, ca. 1980. Condition: excellent. Size: 13/16” x 7/16”. Weight: 15.0 grams.

This beautiful ring is just under a size 6 (perhaps 5.75). It has a lovely foliate design topped off 3 flowers with prong set, very colorful opals inside. The band is marked 10K and MCO with a maker's mark with which I am unfamiliar. It has good heft and is in excellent condition.

An elegant pair of 18K yellow gold knot-style cufflinks set with blue sapphires by Boucheron. The four-lobed faces are formed by a rope-motif tied in an ornate knot. Each lobe features a bright blue round sapphire. The sapphires have eye-clean clarity and medium blue color. The faces are joined by solid connectors to toggle backs decorated in a complementary twisted rope design...

The pilot in your life will love this classic pair of 14K yellow gold Aviator Wings link back cufflinks, styled after the wing pins given to children on flights in the past. Condition like new. Dimensions: 1" long x 7/8" wide. WT: 5 grams.

This sterling silver slide rule tie clip by VERNON has 3 scales: A C D (the C scale is on the sliding scale) and a magnifying lens on the cursor with a red line in the middle, Stamped STERLING on back. Size: 2 3/16" length x 1/4" wide. Condition is like new. Great Fathers Day gift for the Engineer.

A colorful 18K gold and gemstone ring from the “Rainbow Collection” by H Stern. Made 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, iolite, green tourmaline, peridot, citrine, pink tourmaline and garnet...

Hammerman Brothers heavy 18K yellow gold link bracelet made of 8 substantial links. Finely made, hallmarked 750 HB for Hammerman Brothers on tab, 750 on back of clasp. Hidden safety clasp. Excellent condition, beautiful patina gives appearance of higher carat gold. Width: approx 19mm (nearly .75 inch wide at its widest point) Length: 8 inches Weight: 73.4 dwt (114 grams)...

A classic 14K yellow gold dress set comprising a pair of cufflinks and four shirt studs in a slightly squared knot design. The set is well-made and has substantial weight. Each piece is marked "14K".

Origin: America, ca. 1990. Condition: excellent. Dimensions: cufflink faces, 9/16" diameter; studs, 7/16" diameter. Weight: 19.2 grams.

A handsome dress set comprising a pair of cufflinks and three shirt studs. The 14K yellow gold faces have geometric decoration and feature bead-set round brilliant-cut diamonds. The diamonds are estimated at SI2 clarity and J-K color. Those in the studs are approximately 1/4 carat each, and those in the cufflinks are approximately 1/8 carat each. The studs have a spring mechanism and the cufflinks have toggle backs. Each piece is marked “14K.”

Origin: America, ca. 1980...

A very handsome and heavy pair of 18K yellow gold cufflinks, the faces comprising deep violet-blue spheres of lapis lazuli joined by gold collars worked with beaded and zigzag decoration. The lapis has the fine even color often called Afghan. The faces are joined with chains to plain gold baton backs. The batons are fully stamped with 18K hallmarks for London, 1992.

Origin: England, 1992. Condition: excellent. Size: faces, 7/8” long. Weight: 14.4 grams.

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...

Very big vintage Santo Domingo Native American necklace with slightly graduated carved free form turquoise tab beads with traditional silver cone terminals, and hook and eye clasp. 1970s or earlier. The color is amazing, variegated and with great depth. Strung on fine monofilament. It weighs 204 grams. 24 1/4 inches wearable length and 1 1/4 inches wide at center. The center is about 33mm wide. Excellent condition. There are three beads with losses, pictured in last image...

A nice pair of vintage 14K yellow gold cufflinks, each in the form of a large and a small button, complete with raised gold beads to suggest the stitches. The faces are connected by chains. Tested and guaranteed 14K.

Origin: America, ca. 1980. Condition: excellent. Size: 3/4” & 9/16” diameter. Weight: 11.5 grams.

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.

These Mod earrings dangle 1 3/4". They are 3/4" at their widest. The eyes are translucent: a dark purple. They are in great condition.

This Pendant measures 1 1/2" x 1 1/2" x 1/4". It has a Mod Geo Design, accented by its central, dangling "ball." The bail is marked TAXCO MEXICO with FNM in the middle. It also has the Taxco eagle mark with the # 2 in the middle. It has good heft and is in excellent condition.

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...

These cool earrings are best described by the pictures.... The "hook" portion of the earrings measure 1 3/4". The "tear drop" measures (approximately) 3/4" x 3/4" x 3/8" -- again, see pictures. They "hang" 2". They are circa 1980's.