his specimen features a vivid Ruby crystal (a variety of Corundum) naturally perched on a white Calcite matrix. The ruby shows a bright pink-red color caused by trace chromium within the corundum structure. Its well-defined natural crystal form contrasts beautifully with the sparkling calcite host rock, making it an attractive miniature mineral specimen. Ruby crystals commonly form in metamorphic environments and are prized by collectors for their color, durability, and aesthetic association with calcite or marble matrices. This items will be shipped within 3 working days after successful bidding and confirmation of payment by Catawiki. We guarantee 100% quality of our products.