The translucent oval cabochon of mahogany black lace obsidian (cab #200) is a large 38mm x 52mm size by Gary Olson. With the unusual size and coloring, only one cabochon is offered. The obsidian cabochon has some brownish red mahogany with mostly clear to black color patterns in swirls and is beautifully polished. Great for bolas, belt buckles, or use in other hand crafted projects. The translucent obsidian is especially nice in projects with a lighted back.