Watermelon Tourmaline, Afghanistan

Wonderful, lustrous specimen of watermelon tourmaline

Watermelon tourmaline is a rare and unusual variety of tourmaline, with coloring that resembles the pink “flesh”, white “rind” and green “skin” of a watermelon. For jewelry, watermelon tourmaline crystals are often cut cross-section into thin slices to show their distinctive pattern. Fine mineral specimens of watermelon tourmalines are much coveted treasures for both gemstone lovers and collectors. Click here to see some fine examples of both crystals and polished slices of this wonderful gemstone.


Watermelon Tourmaline 2

Shiny green and gemmy ruby red watermelon tourmaline crystal

The distinctive pink, white and green colors of watermelon tourmaline are 100% natural. Tourmaline owes its rainbow coloration to trace impurities of color-causing chromophores which are incorporated in trace amounts in the molecular lattice of the crystals. The colors are indicators of the presence of chromium (red), lithium (green, pink), manganese (pink), or vanadium (green). For example, in watermelon tourmaline from Paprock, Afghanistan, the pink core has almost no iron present, but is greatly enriched in the green outer zone; manganese shows a similar variation in the different zones of crystallization.


Watermelon Tourmaline 3

Excellent watermelon cross-section

Tourmaline is a complex silicate of aluminum and boron. Its composition varies widely with sodium, calcium, iron, magnesium, lithium and other elements entering into the structure. Gem tourmaline is formed in pegamatites, which are formed deep within the earth when magma (fluid rock) is injected into an existing rock matrix. Pegmatites are typically composed of granite and its constituents like quartz, feldspar and mica.  They are the source of such fine as aquamarine, tourmaline, beryl, topaz, etc. The pink core and green rim that give watermelon tourmaline its name are the result of changing chemistry in the fluid mix in which they crystallized.


Watermelon Tourmaline, Brazil

A polished slice of watermelon tourmaline

Tourmaline is believed to strengthen the body and spirit, and protect the wearer against dangers and misfortune. Watermelon tourmaline balances the male/female energies and is useful for attracting love. It is also thought to enhance inspiration and encourage self confidence.
It is the super activator of the heart chakra, providing for stimulation, energizing, and connection with the heart chakra of the higher self. It encourages one to look past the seriousness of the situation and to recognize the benefits (and humor) in the experience. It helps one to experience the beauty of nature, while diminishing emotionalism. It is known to enhance cooperative efforts and inspire tact in all situations.

Watermelon Tourmaline, Pakistan

When backlit, you can see that the red core on this crystal extends to ½" of the termination, making this a candidate for cutting into slices for polishing

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  1. Pingback: Gemstone Spotlight: Watermelon Tourmaline | EraGem Post

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