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Large 4-7\" MAHOGANY OBSIDIAN Specimens + * Choice of 24 * Natural Volcanic Glass For Sale
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Large 4-7\" MAHOGANY OBSIDIAN Specimens + * Choice of 24 * Natural Volcanic Glass: $49.52
AI Description: This listing offers an impressive selection of large Mahogany Obsidian specimens, ranging in size from 4-7 inches. Handpicked from the Modoc County, California, these natural volcanic glass stones are perfect for collectors of crystals and minerals. The unique shape of each specimen is sure to catch the eye, adding an interesting element to any display. The country of origin and shape of the stones are highlighted in the item aspects, making it easy for buyers to identify the specific characteristics of each piece. These specimens are perfect for anyone interested in rocks, fossils, and minerals, or for those simply looking for an eye-catching addition to their collection. This listing is for your choice of the Mahogany Obsidian specimens pictured from Modoc County, California. These specimens are quite showy with a nice contrast between the red and black and would make an excellent gift or addition to your collection.Link to Our Other Crystal and Mineral SpecimensLink to Our Other Wholesale and Bulk Minerals Measurements:14: 4x3x3\" - 1.4 Lbs 46: 4.5x4x2\" - 1.1 Lbs 48: 6x4x4\" - 3.2 Lbs 49: 7x5x3\" - 3.1 Lbs 51: 5x4x3\" - 1.9 Lbs 52: 6x5x3\" - 2.1 Lbs 53: 6x5x4\" - 2.7 Lbs 54: 6x4x2\" - 2 Lbs55: 4x4x3\" - 1.3 Lbs 56: 5x4x4\" - 2 Lbs (w/ snowflake) 57: 4x4x3\" - 1.8Lbs 58: 3x2x2\" - .7 Lbs 59: 4x2x2\" - .8 Lbs 62: 4x3x2\" - .8 Lbs 63: 6x4x4\" - 2.1 Lbs 64: 4x3x2\" - .8 Lbs (w/ snowflake)64: 4x3x2\" - .8 Lbs (w/ snowflake) 65: 6x5x4\" - 3.3 Lbs 66: 5x5x3\" - 1.9 Lbs 67: 4x4x3\" - 1.9 Lbs 68: 5x4x3\" - 1.7 Lbs 69: 4x3x2\" - 1 Lb 71: 4x3x2\" - .9 Lbs 72: 4x4x2\" - 1.1 Lbs 73: 4x4x4\" - 1.3 Lbs 74: 4x3x2\" - .8 Lbs Link to Our Other Obsidian Specimens OBSIDIAN PROPERTIES:Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. Obsidian is produced when felsic lava extruded from a volcano cools rapidly with minimal crystal growth. It is commonly found within the margins of rhyolitic lava flows known as obsidian flows, where the chemical composition (high silica content) causes a high viscosity, which, upon rapid cooling, results in a natural glass forming from the lava. The inhibition of atomic diffusion through this highly viscous lava explains the lack of crystal growth. Obsidian is hard, brittle, and amorphous; it therefore fractures with sharp edges. In the past, it was used to manufacture cutting and piercing tools, and it has been used experimentally as surgical scalpel blades.Category: Volcanic glass Color: Deep black or blackish green Fracture: Conchoidal Mohs scale hardness: 5–6 Luster: Vitreous Specific gravity: 2.4 Optical properties: Translucent Other characteristics: Texture: Smooth; glassy Courtesy of Wikipedia Track Page Views With Auctiva\'s Counter
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