Water Sapphire Iolite

As a proud German family business, we are committed to tradition, quality, and heart. Our gemstones are direct imports from mining regions and usually come from independent mines, which are often family-run as well. The rough gemstones are then precision-cut by us using our specially developed gemstone cut.

Out of conviction, all our gemstones are not only genuine but also untreated and natural—just as they were created by our Earth. We strictly reject all treatment methods such as dyeing, filling, heat treatment, or irradiation. To guarantee this, we inspect our gemstones both in our own laboratory and through independent labs. We firmly believe that, in this way, we can improve the gemstone market and world piece by piece. Thank you for helping us make this possible <3

Iolite (water sapphire) Formula: (Mg,Fe)₂Al₄Si₅O₁₈ = magnesium (Mg), iron (Fe), aluminum (Al), silicon (Si), oxygen (O), with traces of iron for the characteristic pleochroic coloration

Refractive index (IOR): ~1.542 – 1.551

Dispersion: 0.017 (low, results in a fascinating, color-changing shimmer)

Optical character: biaxial negative

Mohs hardness: 7 – 7.5

Density/Specific gravity: 2.58 – 2.66 g/cm³

Crystal system: orthorhombic (prismatic crystals with a rectangular cross-section)

We do our best to provide you and your gift recipient with a special gifting experience. All Pipek products are delivered in our iconic Pipek storage boxes. The box contains inserts that ensure the gift reaches the recipient in perfect condition and that the jewelry can then be safely stored at home or while traveling. During checkout you may have the option to add a personal message. This will be printed and enclosed in a Pipek signature envelope. All our orders – whether as a gift or for yourself – are shipped without a physical invoice or receipt, so no price is visible. If you are a Pipek VIP customer, our team is always available to personally tailor your gifting experience to your wishes. You can reach us at any time using the contact details on your VIP card.