Fireworks Obsidian from Mexico (also known as Flower Obsidian) is a relatively rare form of volcanic glass that displays a multitude of small, chrysanthemum type bursts of red, pink and white on a black field.  Relatively soft but it still takes a great glassy polish to produce very lively finished cabs.

Origin: Mexico

Dimensions: 3.5" x 3.25" and approximately 5.7 mm thick.  Weight = 95 grams. 

Shown wet.  Not polished. Flaws are shown as white lines in the final picture frame.