A wedge of authentic blue topaz set in nickel-free sterling silver and framed by 14k solid yellow gold. Blue topaz measures 16mm x 12mm in size. Band measures 3.5mm wide. David Tishbi Jewelry comes with a Lifetime Warranty. Handcrafted in Israel. What Makes David Tishbi Designs Different? Each piece is made of solid precious metals -- including 14k solid yellow gold and solid sterling silver. Unlike similar kinds of two-tone jewelry, the gold on these handcrafted pieces are not layered or plated. Instead, authentic 14K Solid Gold is combined with sterling silver to create unique two-tone pieces, much in the way that 14k two-tone pieces are created. View More Gold and Silver Jewelry Designs. Apples of Gold is an Authorized David Tishbi Retailer.