These are unheated, untreated, cabochon grade Sapphires from the mines of Pakistan.
They are natural crystal formation shape.
You might even be lucky enough to find a star sapphire in your parcel/s.
Sold in lots/parcels of 20 grams which is 100 carats. ($0.75/ct) same as photo of parcels here.
Or sold as singles in the photo seen ($0.90/ct).
Colour: Blue, pink, yellow, green, orange, purple, clear, black
Crystal System: Hexagonal crystal system
Mineral Family: Corundum.
Chemical Formula: Al₂O₃
Hardness (Mohs): 9
Specific Gravity: 3.99-4.00
Refractive Index: 1.76-1.77
Luster: Vitreous, Adamantine.
Associated Month: September
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