Martin Katz Pavé Teardrop & Rose-Cut Drop Earrings set in 18K white gold; 18 round rose-cut diamonds weighing 1.95 carats and microset with 128 diamonds weighing 1.04 carats. Photo courtesy of Martin Katz.

Martin Katz Australian Black Opal and Diamond Ring. Photo courtesy of Martin Katz

A rare Australian black opal of 8.01 carats, surrounded by a border of micro-set white diamonds, amethysts and tsavorites. Set in 18K white gold. 

Martin Katz Round Emerald Cabochon and Diamond Drop Earrings. Photo courtesy of Martin Katz

“Intense Green” round Columbian emerald cabochons of 20.57 carats, accented with 2 tapered bullet diamonds, 2 crescent half-moon diamonds and micro-set with 208 diamonds. Platinum setting.

Emerald-Cut Diamond Clip On Bangle Bracelets. Photo courtesy of Martin Katz

Martin Katz emerald-cut diamond clip on bangles. Shown here, multi-color stack in blue sapphire, white diamond, black diamond and cognac round diamonds. Each bangle with 3 emerald-cut diamonds and 2 round diamonds in the center. Set in 18K white gold. (Bangles are sold separately).

Martin Katz Diamond Vintage Tassel Style Diamond Earrings. Photo courtesy of Martin Katz

Cushion rose-cut and baguette diamonds of 7.39 carats; with 40 baguette diamonds of 2.70 carats and 2 round diamonds of 1.15 carats. Micro-set with 62 diamonds of 0.71 carats set in 18K white gold.

Martin Katz Cushion Rose-Cut Diamond Ring. Photo courtesy of Martin Katz

Cushion rose-cut diamond of 4.38 carats; surrounded by 12 French-cut diamonds of 2.87 carats; and micro-set with 302 brilliant round diamonds on the band. Set in platinum. Photo courtesy of Martin Katz

Martin Katz Imperial Topaz Ring. Photo courtesy of Martin Katz

18 carat imperial topaz ring, with two step-cut trapezoid diamonds and micro-set with diamonds, sapphires, tsavorite garnets and tourmalines.

Martin Katz Triangular Rose cut Diamond Earrings. Photo courtesy of Martin Katz

Triangular rose cut diamonds, 3.30 total carat weight, micro-set with 312 round diamonds of 1.73 carats. Set in 18K antiqued white gold

Martin Katz Starburst Black and White Diamond Stud Earrings. Photo courtesy of Martin Katz

Round brilliant diamonds, 3.03 carats surrounded by a micro-set starburst border of black and white diamonds, 1.30 total carat weight. Antiqued 18K white gold setting

Martin Katz Baguette cut tanzanites, 25.71 carats; accented with 8 graduating trapezoid diamonds, 2 asscher cut diamonds. Micro-set with diamonds, blue and purple sapphires, amethysts. 18K white gold setting. Photo courtesy of Martin Katz