Jade: Imperial green gem of the East (Part 3) – scientific properties of jade

Sonja McLahlan (UK) In this third part of my series of articles on jade, I will cover the chemical and physical properties found in this gem that make it what it is and why it is so suitable for the wide variety of uses to which it is put. Jade is a polycrystalline gem and is a generic term for two different minerals: jadeite and nephrite. Both materials are very tough as they consist of closely packed and dense crystals. The main differences between the two types are in their chemical composition and the range of colours in which they are found. The toughness of jade is remarkable. It has a strength greater than steel and was put to work by many early civilizations for axes, knives and weapons. Fig. 1. Jade oval cab, stunning Montana deep green with white waves, highly polished. Fig. 2. Jade Shaman Shield. Extremely rare, beautiful chatoyant Montana jade. intense green. Fig. 3. Siberian Jade, -round sweetness. The three images shown above are (C)opyright – Wm Mason: www.mysticmerchant.com. Nephrite The colour of nephrite comes in ranges from mid to dark green or grey-green. However, examples can also be found in tones of white, yellow and red. The colours in nephrite are affected by the amount of iron in it. Low levels of iron produce white, cream and grey colours, whereas green and brown shades are influenced by exposure to iron. The chemical formula for nephrite is Ca2 (Mg, Fe) 5 Si8O22(OH)2, that is, a combination … Read More

To access this post, you must purchase Annual subscription, 12 Month Subscription or Monthly subscription.
%d bloggers like this: