Onyx is a type of Chalcedony, a cryptocrystalline form of Quartz, that occurs naturally with tiny banded parallel layers.  Black Onyx is a stone of decisiveness and strength and is considered a powerful protection stone. Druzy, like many gemstones, is naturally occurring and happens when water brings minerals to a rock's surface, and then the water evaporates. During this process, cooling occurs, and the minerals are left behind to form crystals on top of the rock. 🔹SIZE: US 7.5 🔹WEIGHT: 3 grams🔹DURABILITY: Onyx scores a 6.5-7 on Moh's hardness scale, it is a relatively durable gemstone. 🔹SHIPPING: Free shipping!🔹GIFTS: All items are shipped in a gift box, ready to give or enjoy as a gift to yourself! We can ship directly to your friend/family member. We'd be happy to include a gift note from you too. Just enter the text you'd like us to use in the 'notes to seller' field as you check out.🔹SHOP: Click here to see all our styles https://www.etsy.com/shop/ThreeHorseDesign🔹QUESTIONS? Just click on the 'Message Denise' button below I will answer as soon as possibleThis is a one of a kind ring, the one pictured is the one you will receive.Our photos of the stones are all natural, no Photoshop or tricky lighting here!My jewelry is a perfect gift for mother's day, Christmas, an anniversary or just to celebrate that special person in your life.