This natural Green Jadeite originates from Myanmar (Burma) and its weight is about 4 carats. The measurements are 13.07mm x 8.97mm x 4.59mm (length x width x depth).This gemstone is calibrated to fit 13 X 9 mm jewelry settings. The shape/cut-style of this Jadeite is Pear Cabochon. This 4.18ct Jadeite gem is available to order and can be shipped anywhere in the world. Gemstone Certification can also be provided as an optional service.
Jade has been known and treasured for more than 7,000 years. But only in 1863 was it discovered that jade is actually not a single mineral. What was traditionally called jade is in fact two separate and distinct minerals: jadeite and nephrite.
Nephrite is the more common form of jade. Nephrite ranges in color from mid to dark green or grey-green, but it can also be white, yellowish or reddish. Nephrite is slightly softer than jadeite; nephrite is 6-6.5 on the Mohs scale, while jadeite is 6.5-7. They have quite different chemical compositions as well: nephrite is a calcium magnesium iron silicate while jadeite is a sodium aluminum silicate. The two minerals also have different densities. Jadeite has a density of 3.30-3.38 while nephrite is less dense at 2.90-3.03.
I have not made a lot of purchases from GemSelect, but have been very satisfied with those that I have. The quality of the gems has been good, and I like the pictures provided of the actual gemstones being reviewed. I will certainly be back for more at another time.