Rainbow Obsidian Rough Value Guide

This natural Rainbow Obsidian rough from Mexico is a prized volcanic glass known for its hidden iridescent layers caused by microscopic magnetite inclusions. While it appears as a dark, matte fragment in its raw state, its characteristic conchoidal fracture reveals the potential for vibrant color play once polished.

What affects the value of Rainbow Obsidian Rough?

• The intensity and variety of colors visible within the internal sheen significantly impact the $24-$26 price point.
• The overall size and weight of the rough fragment determine its utility for lapidary work.
• Clarity of the glass and the absence of internal cracks or structural flaws increase collectible value.
• The distinctness of the exterior rind versus the quality of the exposed volcanic glass surfaces.

How to Identify Rainbow Obsidian Rough?

• Look for the characteristic dark, shell-like conchoidal fracture patterns typical of volcanic glass.
• Identify the matte, weathered exterior rind which contrasts with the glassy interior surfaces.
• Check for subtle, microscopic magnetite inclusions that create the 'rainbow' effect under bright light.
• Verify the origin as Mexico, a primary source for high-quality iridescent obsidian varieties.

History of Rainbow Obsidian Rough

Obsidian is a volcanic glass formed when lava cools rapidly with minimal crystal growth. It has been used for millennia to create sharp tools, mirrors, and ornaments. Rainbow obsidian is unique for its microscopic inclusions of magnetite or other minerals that create a colorful sheen when polished.