richardbenson wrote:
graelwyn that looks like a sweet stone there, how common is it?
Not common at all, sadly. There were only 2 pieces where I bought it and not seen it anywhere else since and I go in a lot of shops selling this stuff.
It turns up on ebay sometimes though.
It is known to be the oldest gem/stone in existence tho...around 5 billion years if I recall rightly.
Hmm, found this info on it too.
Nuummit (also spelled as Nuummite) is an extremely rare mineral with an amazingly old age!
Its occurrence is limited almost exclusively to the Nuuk region of southwestern Greenland from where it gets its name. It has since been found in several localities in the outer part of the Godthabsfjord near Nuuk.
Nuummite is a gemstone formed from a mixture of two minerals from the Orthoamphibole Group, Anthophyllite and Gedrite.
Nuummit occurs in brown (including golden brown), green and nearly black with remarkable rainbow flashes. Nuummit is a foliated metamorphic rock and is approximately 3.8 billion years old. It is composed of Magnesium, Iron, Silicon, Oxygen and Hydrogen. By virtue of its age Nuummit is unique - there quite simply is no other comparable material of the same age anywhere on the planet.
Nuummite is generally easy to polish, even though, in certain qualities of gemstones with many parallel crystals, it can be difficult to avoid holes and cracks. While Nuummit has been used for untold centuries as beads and ornamental stones, it has just recently appeared in the gemstone market. It has since been fashioned into extremely attractive cabochons and miscellaneous shaped pieces for Jewelry. In larger pieces it is possible to retain most of the colors of the iridescence (i.e. the rainbow like color effects seen in some gems), so that one end of the cabochon has a golden hue while the opposite end has a bluish tone.
Other minor occurrences of Nuummit include Spain and southwest of Douglas, Converse County, Wyoming, U.S.A. but it is only in the Greenland type that the coloration is well enough developed to be suitable for gemstones.