![]() The black obsidian conchoidal fracture makes the rock exhibit wave-like effects separating the flake with round patterns from the impact point when you strike it at a right angle. The black obsidian is well-known for its conchoidal fracture. However, this obsidian lacks the crystalline structure in most quartz or microcrystalline stones, such as chalcedony. Silica takes most of the black obsidian’s weight, approximately 70%. Despite the name black obsidian, this stone has some degree of translucent. This rock comes with a proper coloration from different nanoparticles from oxidized iron that the stone traps in its structure. Black ObsidianĮxperts commonly refer to this type of obsidian as volcanic glass. ![]() Remember to choose a high-quality one to get the best and most stunning results from the cutting or end products. You can find this valuable rock at different locations along the West coast in the United States or Mexico. Studies show that this rock has been the second most expensive or valuable type of obsidian for a long time. You’ll find this mineral in the rainbow obsidian, which causes lighting hitting the stone to reflect differently, resulting in a substantial oil slick effect. The nano-rods of hedenbergite are the leading cause of this discoloration. Rainbow obsidian ranges from incredible pastel colors, full-facing to the barely visible sheen. You can get these rocks for the locations for your different needs. Experts reveal that the most striking examples of rainbow rocks are common in the Warner Mount areas. This prized rock or material comes in various colors to allow you to choose the appropriate one suiting your needs. Before experts discovered the fire obsidian, the rainbow obsidian was the most expensive rock with a high intense effect. When you hit this rock with light at its surface, this rainbow pattern appears in concentric rings. ![]() It’s a unique and attractive obsidian variety exhibiting a rainbow pattern. Let’s look at the different types of obsidian and their properties: 1. Experts classify these rocks as common varieties and unique forms. Obsidians come in different types with varying colors and shapes.
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