{"product_id":"black-onyx-20-x-15mm-oval-cabochon","title":"Black Onyx 20 x 15mm Oval Cabochon","description":"Add depth and drama to your jewelry designs with this black onyx oval cabochon. This cab complements any metal and is ideal for one-of-a-kind designs.\n\nOnyx, a type of opaque chalcedony, is naturally black and is generally dyed to achieve a more uniform color—it is the most common black gemstone and is popular for creating a striking centerpiece and for adding contrast to designs that include lighter and\/or more colorful gems. It is a hard gemstone and takes a high polish; since ancient times, onyx has been a favorite for carving.\u003cbr\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGemstone Type:\u003c\/strong\u003e Onyx\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStone Shape:\u003c\/strong\u003e Oval\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStone Size:\u003c\/strong\u003e 20 x 15mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStone Type:\u003c\/strong\u003e Natural\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhancement:\u003c\/strong\u003e Dyed (D)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMohs Hardness:\u003c\/strong\u003e 6.5–7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRefractive Index:\u003c\/strong\u003e 1.53–1.54\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecific Gravity:\u003c\/strong\u003e 2.55–2.7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.000 kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Amadesa","offers":[{"title":"20 x 15毫米","offer_id":50754819064154,"sku":"78102","price":176.01,"currency_code":"CNY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0934\/7897\/7882\/files\/78102.jpg?v=1742361540","url":"https:\/\/www.amadesa.com\/zh-cn\/products\/black-onyx-20-x-15mm-oval-cabochon","provider":"Amadesa","version":"1.0","type":"link"}