We are offering shale. Shale is a fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite. The ratio of clay to other...
Dyed to achieve vibrant colors (like purple, red, green, or orange). Compressed under high pressure using a hydraulic press. Stabilized with a clear resin to harden the material (Turquoise is naturally soft, $5-6$ on the Mohs scale). Injected with...
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