BLUE KYANITE JEWELLERY SET
A lovely Blue Kyanite Jewellery Set with Silver Earrings, Silver Pendant and Silver Ring. Round cabochons set in simple .925 Sterling Silver settings. Blue Kyanite is one of my favourite stones, the colour is always natural and bright. A beautiful stone yet inexpensive for the colour, which not too many others can rival. A great gift or treat, these come in a silk gift pouch. The Ring is 7.5 US or O – P UK. The cab sizes are Pendant D1.4cm, Ring D1.2cm, and Earrings D1cm. The slim Silver Necklace chain is 50cm long.
Kyanite is a polymorph with two other minerals, Andalusite and Sillimanite. A polymorph is a mineral that shares the same chemistry but a different crystal structure with another, or other minerals. Kyanite is an attractive mineral that has a near sapphire like blue color in some especially nice specimens. Kyanite has a unique characteristic in that it has a wide variation in hardness, in the same crystal. The hardness of Kyanite is approximately 4.5 when scratched parallel to the long axis of the crystal and approximately 6.5 when scratched perpendicular to or across the long axis. Other minerals usually have variable hardness on different crystal faces due to a different concentration and orientation of the atoms in the structure. Diamond is one such mineral, a fact gem cutters take advantage of often.