Large Herkimer Diamond, Raw Quartz from New York State rare old stock This is a very high

This is a very high grade Gypsum from the Defunct Naica Mine in Mexico

One of a kind Collector Specimen

It signifies that Pakistani demantoid has a distinctive geological origin resulting from the interplay of serpentinization and skarnization processes

but my best guess without testing is hematite

Large Herkimer Diamond, Raw Quartz from New York State rare old stock This is a very highLarge Herkimer Diamond, Raw Quartz from New York State, 150g Huge Crystal, Full of Rainbows, Record Keepers, High Luster, Very Rare Mineral Stunning BIG Herkimer Diamond Quartz from New York! This gem is full of rainbows, with good clarity, amazing luster, sharp terminations, and amazing presence! Mostly undamaged, look closely at photos and video for 'imperfections', this gem will come exactly as you see it ~*~*~ Slight presence of smoky quartz