Locality: Green River Formation (Elimia tenera beds; trade 'Turritella agate'), southwestern Wyoming, USA

Description: There are hard, agatized turritella shells scattered throughout the rock. The entire stone is agatized and solid. It takes a great polish and the shells are abundant throughout it.

Age: 45-50 million years old
Chemical Composition: SiO₂
Grade: Lapidary Grade
Appearance: Opaque

Inclusions:
Cracks: Minimal
Mineral: Minimal- This is a solid stone to work with. The rind gets a bit softer in areas, but overall, a good agate for lapidary.

Cost per Gram: $0.12
Size range: Medium

Rough is rough. We do our best to grade and describe pieces in the lot, but ultimately, they all differ.