Source: Only one place on the earth, and that is nine miles north of Llano, Texas, in a road cut by Texas Highway 16.
Chemical: Granite rock. Combination of pink feldspar and blue quartz…a very rare occurrence of blue quartz.
Crystal System: Combination of several included in rock.
Formation: This is a granite intrusion into the surrounding limestone and is the only place on earth where it is found.
Properties: This is a very, very hard granite rock. Ask anyone who has visited the site and tried to hammer a piece out of the rock. But it is well worth the effort because the rare and unusual blue quartz crystals are quite large and easily visible. And the the unique combination of pink feldspars and blue quartz makes this a “must have” for mineral collectors.
Pink feldspar and blue quartz crystals can easily been seen in llanite