Iolite, also known as Cordierite, was in the past called Water Sapphire, but it is not related to sapphire (corundum). This is a beautiful blue stone with a modest price tag. This is quite suitable for jewelry, having a hardness of 7.5.
- Origin: Tanzania
- Weight: 1.66 carats
- Dimensions: 9.5 x 6.8 x 4.5 mm
- Color: Dark Blue, GIA: B 6/6, World of Color: 7.5PB 2/10
- Clarity: GIA: VVS (eye clean) Gemworld International: FI (free of inclusions)
- Cut: Rectangular Cushion
Overall Quality: 7.0 (upper good)*
* For a description of quality factors, see the valuation article.