Calcite on Quartz, Museum-Sized Specimen, ScotlandCalcite on Quartz New Glencreiff Vein, Wanlockhead Dumbries & Galloway Scotland Approx. Dimensions: 7. 6 in x 6. 25 in x 2 in Approx. Weight: 1,520 grams Colorless druzy Quartz is covered with a scaly coating of white calcite make up this museum sized specimen. The Calcite coats the top in some areas, revealing the sparkling Quartz beneath. On the bottom side of the specimen, Calcite covers the Quartz like a thin sheet of snow.