Founded in 1978 Katz Imports used to reside in the Neff building on Philadelphia 's famous Jewelers Row. In the mid '80s we moved to 723 Sansom St which is smack in the middle of Jewelers Row. Since day 1 we have been importing loose diamonds into the country, and as a wholesaler, selling the diamonds to retail stores. We originally specialized in loose diamonds but have been expanding ever since. We are now Philadelphia 's largest diamond wholesaler & importer. We are now specialize in diamond engagement rings, diamond eternity bands, diamond wedding bands, diamond stud earrings, diamond tennis bracelets, and diamond tennis necklaces. Add'l Notes: We are open Mon-Fri 9-5 & weekends only between Thanksgiving - Xmas. Sell to the public on www.penndiamondexchange.co