6.40/CT Black Onyx | Premium Quality

Product Description Products Details Allow our team of expert gemologists select a Natural Black Onyx Natural gemstone of Premium Quality from our offline inventory of gemstones. The selected gemstone shall be of relatively the same quality as those shown in the sample photographs, with weight within -0.2ct to +0.5ct range from your selection. You can alternatively decide to browse through our collection of catalogued gemstones with photos and videos to select a gemstone of your own choice by going to the Black Onyx Natural category page General Traits Report No. B-ONYX-0145 Product Name Black Onyx Color Black Weight (Carat) 6.40 Weight (Ratti) 7.10 Shape & Cut Cabachon Specific Gravity 2.61 Hardness 6.5 On the Moh's scale Refractive Index 1.53