The Rialto Best Diamond Price Guarantee will give you piece of mind when purchasing a diamond for your engagement ring. We have the lowest prices on loose diamonds in San Antonio. We will match ANY local jewelry store diamond price because we are not your typical corporate store. We can compete with all jewelry stores. Bring in your quote from any local jewelry store. If it is lower than our price, we’ll match it. IT’S THAT EASY! Don’t buy an engagement ring without coming into Rialto Jewelry. With our Best Diamond Price Guarantee, there is no need to go anywhere else. That’s our guarantee!