Tourmaline
Item Number: 2021-0288
In stock
S$5,350.73
Ask about gemstone
14 mm x 12,38 mm x 11,04 mm
- Separate mineralogical group with many varieties
- Hardness grade 7 - 7,5
- Chemical formula: XY3Z6(T6O18)(BO3)3V3W(V, W, X, Y, Z stand for different possible elements)
- Includes all colors
- Colored by different metal oxides
- Specific gravity 2.8 - 3.3 g/cm3
- Brasilia
- Madagascar
- Pakistan
- Various locations in Europe
- Mozambique
- Namibia
- Nigeria
- Oldest known locality in modern trade: Brazil
- Occurs in all colors
- Forms beautiful crystals with very good crystal endings
- Various esoteric and healing meanings
- Also large crystals and large cut stones possible
- The locality Pakistan was discovered only around 2010
- Still undervalued compared to other gemstones.
- Exception: the Paraiba tourmaline, which can be more expensive than sapphire
- Stones should be at least 5 ct in weight, except for Paraiba
- Larger stones have higher appreciation
- Experts calculate 6 - 8% increase in value per year
- Beautiful, pure stones with clear colors are preferable
[cleverreach form=219969]
