Tourmaline is a lovely stone which can occur in almost any colour. Some Tourmalines are also bi-coloured. It is a relatively inexpensive gemstone currently gaining popularity in jewellery making.
“” 4.0 4.0 5.0 6.0 8.0 6x4 TOURMALINE
Hardness (Mohs’ Scale): 7-7.5 Specific Gravity (S.G.): 3-3.1 Refractive Index (R.I.): 1.62-1.65
This stone was
beautifully cut with no visible inclusions. It looks absolutely perfect. Mrs Gristwood, Armadale
Tourmaline, Pink CODE
61TR AHPF
Crystal System: Trigonal Chemical Composition: Complex boro-silicate of aluminium, magnesium & iron
Turquoise is a waxy looking opaque blue gemstone, sometimes featuring small irregular veins or patches in white, black or brown. The colour can vary from deep sky blue through to green.
TURQUOISE
Hardness (Mohs’ Scale): 5.5-6 Specific Gravity (S.G.): 2.6-2.9 Refractive Index (R.I.): 1.62
