Nephrite
A species of Tremolite, Also known as Nephrite Jade, New Zealand Jade, Spinach Jade, Lapis Nephriticus, Talcum Nephriticus Scientific name : Nephrite Mineral : Tremolite
Nephrite, A species of Tremolite
Also known as:
Nephrite Jade, New Zealand Jade, Spinach Jade, Lapis Nephriticus, Talcum Nephriticus
Scientific name: Nephrite
Mineral: Tremolite
Description
Nephrite is one of two minerals referred to as jade. Though it was first used for tools and weapons, nephrite is also used in creating artistic or ritual objects in green and other colors. It also makes a durable gemstone. It symbolized moral integrity in ancient China and is esteemed in Mesoamerican and New Zealand Maori cultures.
Physical Properties
Colors
Green, gray-green, reddish-brown, black
Texture
NonFoliated
Luster
DullVitreousGreasy
Diaphaneity
TranslucentToOpaque
Refractive Index
1.600-1.627
Birefringence
0.027
Pleochroism
None
Optical Character
Biaxial negative
Chemical Properties
Formula
Ca2(Mg, Fe)5Si8O22(OH)2
Elements listed
Ca, H, Mg, O, Si
Common Impurities
Fe
People often ask
General Info
Price
Color, purity, luster, and weight are the decisive factors affecting the price of nephrite. At about 2.5 cm across, the price of a tumbled stone with average quality is usually $2-$10/piece.
How to Select
There are a few things to consider when selecting nephrite, the more common and less expensive type of jade. Clarity is one of the most important factors, as cracks and other imperfections typically lessen its value. Siberian nephrite is the most valuable variety due to its dark green color and black inclusions. Translucent and brightly colored varieties of nephrite are uncommon and are typically more valuable, while colorless or white specimens fetch very high prices. Specific gravity and hardness can be used to test the authenticity of gems.
Usage
Nephrite is often used for jewelry in western China. The stone has a long history in the region. Carvings and jewelry were often placed in tombs signaling the wealth and importance of the deceased. Its use was common during the Ming and Qing dynasties. Religious artworks were and still are carved from nephrite.
How to identify it?
AI rock expert in your pocket
Scan QR code to download
