Read: 770
Original text:
Jade represents nephrite, jadeite, and under certn conditions green omphacite globally. This gemstone's origins can be traced back to prehistoric times when early s crafted weapons, tools, ornaments, and ritual objects from it in the dim caves and huts where they resided. These creations were imbued with powers symbolizing connections between heaven and earth, life cycles, and the forces of birth and death.
Description:
Jadeite and nephrite are two primary types of jade. Jadeite is chemically sodium aluminum silicate NaAlSi2O6, while nephrite comprises calcium magnesium iron or calcium iron aluminum silicate hydroxide Ca2Mg,Fe5Si8O22OH2. Under certn conditions, green omphacite can also fall under the jade umbrella. This gemstone is avlable in various colors including green, white, orange, yellow, laver, and black.
History and Lore:
Confucius emphasized that jade embodies virtue with its brilliance symbolizing heaven.
Bi Symbolism:
The ancient Chinese bi disc pierced through its center was a symbol of heaven.
Yu Origin:
One of the oldest Chinese characters dates back to 2950 BC.
Facts:
Mineral Composition: Jadeite, Nephrite, Green Omphacite
Chemical Formula:
Jadeite - NaAlSi2O6
Nephrite - Ca2Mg,Fe5Si8O22OH2
Omphacite - Ca,NaMg,Fe2+,AlSi2O6
Color: Multiple hues including green, white, orange, yellow, laver, and black.
Refractive Index: Ranges from 1.666 to 1.680 with a +-0.008 error margin for jadeite; for nephrite it's approximately 1.606 to 1.632 with error margins of +0.009, +0.006.
Birefringence: Often unobservable.
Specific Gravity: 3.34 and 2.95 respectively
Hardness on Mohs Scale: 6.5-7 for jadeite and 6.0-6.5 for nephrite
Research References:
California Jade's Geologic History
The John Sinkankas Memorial Symposium April 21, 2007
Jadeite Jade: A Stone Culture
Serpentine Gemstone Val Malenco Alps
Book Recommations:
California Jade: The Geologic Story of Nature's Masterpiece
The John Sinkankas Jade Symposium - April 21, 2007
Jadeite Jade: A Stone Culture
Diving into the Creation of Jadeite Masterpieces
Notable Articles:
Peridot and Fancy Diamond Features.
Diamond’s Rarity and Beauty.
Emerald's Bluish Green to Green Variants in Beryl.
Citrine’s Transparent, Pale Yellow to Brownish Orange Quartz Type.
This Month's Featured Gems:
Explore Peridot's Origin and Characteristics
Dive into the Brilliance of Dazzling Diamonds
Discover the Intricacies of Diamond Quality Evaluation
Unravel Emerald Mysteries with Its Green Variations in Beryl
Decipher Citrine’s Transparency Ranging from Pale Yellow to Brownish Orange
of Document.
This article is reproduced from: https://www.gia.edu/jade
Please indicate when reprinting from: https://www.f501.com/Jewelry_Jadeite/Jade_Gemstone_History_and_Facts.html
Jade Gemstone Prehistoric Origins Nephrite and Jadeite Types Confucius Virtue Symbolism Bi Disc Ancient Chinese Symbol Omphacite as Jade Substitute Color Variations in Jade Gems