Thursday, December 27, 2012

Gemstone of the Week: Eudialyte

(Eudialyte image found on alpinegems.ca)
(Eudialyte image found on heartsofstonestudio.com)

Eudialyte is the primary gemstone belonging to a group of gems called the "Eudialyte group" which is a group consisting of five other gems.  Eudialyte is a truly gorgeous gem, and yet one that I'm certain very few people (outside of gemologists, mineralogists, and, perhaps, some gemstone collectors) have heard of.  This gem has a hardness of 5-6, with dull or vitreous luster. It may be many different shades of red, red-orange, pink, orange, brownish-red, yellowish-brown, brown, yellow, violet, or green.  It is a fairly rare cyclosilicate and was discovered in 1819 in Greenland,  and may be transparent to translucent or opaque. According to same places that I've looked at, some opaque examples of Eudialyte appear to have some chatoyancy. As compared to other gemstones, you can get Eudialyte at some relatively low prices, but you should still expect to pay a upwards of a few hundred for some examples.  Eudialyte may be found in: Brazil, Australia, Portugal, Madagascar, South Africa, Namibia, Malawi, Tanzania, Kenya, Guinea, Libya, Morocco, Ukraine, Tajikistan, China, Mongolia, Russia, Sweden, Norway, Greenland, all across  Canada, and the states of Alaska, Arkansas, Montana, Texas, and New Mexico.