Crushed Ruby (Corundum) Sand (Grade A) from India, 3 Sand Sizes for Ring Inlay, Resin Art, Memorial & Sand Jewelry, Birthstone Projects

Ruby, a variety of corundum, is one of the hardest natural minerals with a Mohs hardness of 9. While corundum occurs in a range of colors, the two most recognized forms are ruby and sapphire. The distinction comes from trace elements—ruby contains chromium, which gives it its signature red to reddish-purple color. This batch of crushed ruby corundum is sourced from India and is a high-quality Grade A material. It has rich, consistent color and is opaque, sitting just below gem-quality material that would have higher clarity. It’s a clean, vibrant option that works well for inlay, resin, and decorative applications. Ruby is also the birthstone for July, making it a great choice for custom birthstone pieces or meaningful additions to your projects. MATERIAL SIZE Our crushed sand-sized material ranges from very fine to coarse sand, and is available in three different size variations: 1mm to 2mm (coarse sand), 0.25mm to 2mm (medium sand), and 0.25mm to 1mm (fine sand). Our sand-sized material is ideal for a wide range of creative projects, including woodworking inlays, memorial and resin jewelry, orgonite pyramids, ring inlay, resin molds, mosaics, terrariums, bezel cups, resin art, embellishments, and metaphysical projects. * COARSE SAND - 1mm to 2mm: medium to coarse sand; narrow grain size distribution with similar size particles * MEDIUM SAND - 0.25mm to 2mm: very fine to coarse sand; wide grain size distribution with an even mix of larger and smaller particles * FINE SAND - 0.25mm to 1mm: very fine sand; narrow grain size distribution with similar size particles MINERAL PROPERTIES Mohs’s Hardness: 9 Specific Gravity (g/cm3): 3.95 - 4.10 Luster: Vitreous Color: Reddish-Purple Origin: India EXTRA LISTING INFO ***Please note that this mineral is dense; therefore, the smallest amount offered is one ounce.*** We prioritize providing high-quality materials for all artisans; therefore, our stones are natural and untreated unless otherwise specified. Photos may showcase both wet and dry crushed stone. Please note that wet stones can appear darker, which may resemble the finished look of the material after it's sealed with an adhesive. We use the metric system for all size measurements, with units in millimeters (mm). Refer to the product photos for a visual guide using a metric ruler (cm/mm).