Fluorapatite Crystal | Perky Box Thumbnail Specimen | Cerro del Mercado | Durango, Mexico black chondrite Faden quartz forms in fracture

Faden quartz forms in fracture zones within metamorphic rocks

The R chondrites also have the highest 17O value of any other solar system material

This is a superb looking Gold Basin meteorite weighing 14

This bright yellow green single terminated crystal would be a great addition to any new or existing collection

Fluorapatite Crystal | Perky Box Thumbnail Specimen | Cerro del Mercado | Durango, Mexico black chondrite Faden quartz forms in fractureThis is an incredible green yellow fluorapatite crystal from Cerro del Mercado (Iron Mountain) at Durango, Mexico. It is completely free of the matrix and has a relatively perfect termination. The specimen came from the Earl Calvert Collection. At Cerro de Mercado numerous veins containing gemmy, lemon yellow to greenish fluorapatite crystals cut through the hematite massif. These crystals have been collected for decades from the area's iron mines,