Natural Black Onyx 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 14mm Flat Back Round Cabochon Loose Gemstones Free Shipping via USPS First Class w/Tracking Number Please Note: The number of gemstones you will receive is equal to the number selected in "Purchase Quantity".No guarantee of randomness and/or matching of gemstones is implied by this listing. Minor variations in dome height will occur. No two gemstones are alike. If requiring something specific, please message before buying. Otherwise random selection will be made to fulfill orders.We do not mind working with you, but we need to know when you have special requirements to ensure customer satisfaction.