Large Lot of Natural Rough Sapphires – 171.6 g / Approx. 858 Carats – Untreated, Mixed Sizes Impressive collection of natural rough sapphire crystals, offered as one substantial lot. The stones are in their raw, uncut state, ideal for lapidary work, specimen collectors, study material, or mineral displays. Total weight: 171.6 grams (Approx. 858 carats – roughly 100 carats per 20 g, as noted) The lot contains a wide variety of sizes and shapes, from small chips to larger chunky pieces. Color ranges from deep blue and blue-grey to darker mineral tones typical of natural sapphire in rough form. Surfaces show natural crystal faces and matrix remnants.