Mint Tourmaline

Mint tourmaline is a soft, light green to pastel bluish-green variety of the tourmaline group, belonging to the lithium-rich species elbaite. Its fresh, delicate color sets it apart from the deeper greens of typical verdelite tourmaline.

The green color is generally caused by traces of iron, sometimes with chromium or vanadium contributing brighter or more bluish tones. The lightest, cleanest mint stones have a clean, refreshing appearance popular in modern jewelry.

Like all tourmalines, it forms striated trigonal prisms and shows pleochroism.

Mint tourmaline forms in granitic pegmatites rich in lithium, boron, and the trace elements that produce green coloration, mainly iron and sometimes chromium or vanadium. Gem crystals grow in pockets as the pegmatite's late-stage fluids crystallize and cool.

The pale, minty tone reflects relatively low concentrations of the green-causing chromophores. Notable sources include Mozambique, Brazil, Nigeria, Afghanistan, and Madagascar.

Durable crystals also occur in alluvial gem gravels.

Look for transparent pale minty-green crystals with a rounded triangular cross-section and lengthwise striations. Hardness is 7-7.5, luster vitreous, streak white.

Mint tourmaline shows pleochroism and double refraction, helping separate it from singly refractive green stones. Distinguish from green beryl/emerald (hexagonal, different inclusions), peridot (higher birefringence and oily luster), and fluorite (much softer at 4, with cleavage) by hardness and crystal form.

The trigonal prism, striations, lack of cleavage, and soft mint color confirm tourmaline.

Mint tourmaline is faceted into fresh, light gemstones popular in contemporary jewelry, including rings, pendants, and earrings. Its soft pastel color appeals to modern tastes and pairs well with white metals and rose gold.

Clean, evenly colored mint stones with good brilliance are the most desirable, while the hardness of 7-7.5 makes them durable for everyday wear. They offer an affordable alternative to pricier green gems.

Metaphysically, green tourmaline is associated with the heart chakra and renewal, though such claims are not scientifically supported.