Martin Katz

Need some inspiration for that jewelry gift? From polished pearls to trendy mismatched earrings, these six distinctive designs will help lead you to the perfect present for the gem-lover in your life.
Tanzanite, an enticing, deep-blue gem, was discovered in the foothills of Tanzania’s Mount Kilimanjaro in the 1960s and introduced to market by the iconic American jewelry brand Tiffany & Co. The...
The Beverly Hills jeweler talks stones, cars, and Tom Ford with Robb Report’s Carolyn Meers. What should every woman have in her jewelry collection? White diamonds. It’s like building a clothing...
Diamonds —which are April’s birthstone— have reigned supreme as the planet’s most desirable gemstone since before they first surfaced in Italy’s marketplaces in the 15th century, reportedly excavated...