These materials are all calcium carbonates. They vary in hardness from 3.0 to 4.5 on the MOH hardness scale (compared to 1.5 for alabaster). Nature provides us with a huge pallet of stone colors and patterns. Considerations beyond stone hardness are brittleness, the complexity of the pattern and the ability to take a sharp line or thin section. These may be liabilities OR they may be assets. It is best for us to discuss the options for your project.
Green, White, Honey, New: Red Multicolor Onyx $1.50/#
New and rare: Persian Pink Onyx $1.75/# Special from 13,200’ in the Argentina mountains: Andes Blue Onyx $ 2.95/#
Argentina Banded Fluorite (a semi-precious stone) $ 3.50/#
New: Smeralda Green Onyx $1.75/#
Chinese and Atlantic Black, Belgium Black, Tennessee Imperial Black $1.60/# / $2.85/# / $ 1.25/#