Crushed Yellow Aventurine Coarse Sand - Natural GemstoneYellow aventurine is a variety of quartz with a warm golden yellow color from goethite and pyrite mineral inclusions, giving each particle a natural sparkling shimmer. Our coarse grind yellow aventurine sand preserves the largest visible particle size, showing the stone's rich golden color and natural sparkle at their most vivid. For Jewelry Makers & Crafters Coarse yellow aventurine sand is ideal for resin casting, crystal bezels, epoxy river tables,