Lab Gemstone - Ruby - Square

Our lab created gemstones are as beautiful as natural stones. These high quality stones are precision cut and perfect for any setting, or to embed directly into metal clay. Available in a variety of shapes, sizes and colors, get the sparkle and shine of natural stones with these beautiful, affordable gemstones. Lab Gemstone - Ruby Stable at all metal clay temperatures. Hardness: Lab Ruby has a rating of approximately 9 on Mohs hardness scale vs. a rating of 10 for diamond. Lab created gemstones are more affordable than natural stones, and unlike natural stones, they have no flaws. Click here for our Gemstone Firing Guide, a comprehensive list of gemstones, firing times and the temperatures each can withstand.