Blue Lace is one of the most prized agates and has been hard to find lately. The best Blue Lace Agate comes from Namibia. We were lucky to be able to pick up an ample supply of Namibian Blue Lace Agate. Agate is a form of microcrystaline quartz. It is usually formed in nodules and has transparent, or translucent portions. As with all of the other species in the quartz family, agate takes a high polish with cerium oxide, but also takes a fine polish with tin oxide and diamond. Mohs hardness 6.5 to 7.