CHI207jr Chinese Agate, Middle-Class Mine Pyrite Septarian concretions or Septarian nodules

Septarian concretions or Septarian nodules

Black Tourmaline crystal with natural termination

Mohs Hardness Scale

Epidote in Prehnite tumbled stone from Australia

the mine has been continually worked to this day

CHI207jr Chinese Agate, Middle-Class Mine Pyrite Septarian concretions or Septarian nodulesThis is a polished specimen featuring yellow, pink, and white banded agate and a crystal center. 6. 5 cm x 4. 8 cm 0. 52 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 mining process