Here at Cooksongold we have an unbeatable range of loose gemstone, ready to work with, visually stunning and of the highest quality our gemstones offering is favoured by both the professional and beginner jewellery maker. Part of this range includes the most popular black coloured gemstone, the Onyx.
Gemstone Specification: Onyx gemstones measure 6.5-7 on the Mohs hardness scale. An easy stone to work with, the Onyx is a variety of the quartz family of minerals and is easily identifiable from its rich black colour. It is advised that, due to the nature of the stone, onyx gemstones are not placed in an ultrasonic, steam cleaner or in chemical cleaning solution. Our stock offering of Onyx gemstones includes a selection of round, semi-precious beads in 16” strands and round, oval and flat back cabochon stones starting from 4.00mm and going up to 15.00mm.
A great gemstone option for a range of jewellery making projects, the onyx is perfect for both beginner and professional designs. Shop the full collection and find the perfect onyx gemstone for your jewellery making today.