CHI169jr Chinese Agate, Middle-Class Mine Towers & Points The chemical formula for Black

The chemical formula for Black Tourmaline is NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

This spiral bound collection contains 56 pages of stories and dozens of colored personal photographs taken by Gene during his time mining

Swazi Agate necklace features a beautiful 28 mm round Swazi Agate cabochon in silver on an 18" Italian silver chain

please describe your desired size range in your order Notes before checkout

Please Note: The pieces of copper photographed are representative of the material and may not be the exact  pieces you receive

CHI169jr Chinese Agate, Middle-Class Mine Towers & Points The chemical formula for BlackThis is a polished specimen featuring yellow and orange agate with a vugg containing little crystal clusters. 4. 6 cm x 5. 6 cm 0. 32 lbs Agates from the Middle Class mine show a broad range of colors including red, yellow, purple, brown, blue, and black. Agates from the Middle Class mine also often contain druzy pockets with hematite and calcite crystals. Agates from this mine also contain a higher percentage of heat and stress fractures from the