Search results for: aventurine | International Gem Society

$Table of Refractive Indices and Double Refraction of Selected Gems$

Table of Refractive Indices and Double Refraction of Selected Gems

Refractive indices and double refraction (birefringence) help gemologists identify gems. The following table lists these values for selected gemstones.

The Mohs Hardness Scale and Chart for Select Gems

The Mohs hardness scale measures a mineral's resistance to scratching. Find the traditional scale here and a chart of select...

Specific Gravity Values of Selected Gems

Measuring specific gravity helps gemologists identify gemstones. The following table lists the specific gravity values for a variety of gem...

Gem, Mineral, and Rock Scanner Identification Apps Review

How accurate are gem, mineral, and rock scanner identification apps? Our review covers the strengths and weaknesses of over 20...

Jade Color Trade Names

Jade color trade names describe prized hues and patterns in jadeite and nephrite stones. Learn about the most popular and...

Gemstone Magnetism: The Forgotten Property

Although gemstone magnetism isn't commonly tested, it can help gemologists distinguish similar looking gems. Learn how to analyze this property....

Jade Buying Guide

Learn everything about jade buying with our comprehensive guide. Discover quality factors, treatments, and pricing for jadeite vs nephrite jade...

Mineralogy of Phyllosilicates and Tectosilicates

The silicate subgroups of phyllosilicates and tectosilicates include minerals used in industry and jewelry. Learn how to identify them.

The History of Lapidary

A full and complete history of the lapidary arts, from 70,000 BC to present day. The origins of faceting, bruting,...

Of this was imperial jadeite what would the value of it be?

have to agree with royjohn and jcbell… cannot id anything with certainty from photos. can't tell if its even nephrite jade… could be a green quartz stone like aventurine. Don't expect to get high q...

Identification old necklace

This looks more like Aventurine than Jade to me. Both Aventurine and Jade, Nephrite as well as Jadeite, come in various shades of green. This looks like it has something shimmery, which is more lik...

Mystery Pink Stone - "Pink Tulip Quartz?!" - Nah!

I've had a suggestion that this might be Pink Aventurine. That explanation "sits well" with me even though I know that positive identification cannot be made from a photo. Since Aventurine is a typ...

Chalcedony id of inclusions

Looking at the images, and comparing it to other known samples of chalcedony, I am inclined to believe that it falls into 1 of 3 possibilities: (and possibily the least likely) There may have been ...

Emerald in Biotite Host or?

Invest in some books on basic mineralogy. ID'ing from pictures is really not possible… this line has been repeated by numerous people on this website. the Simon and Schuster field guide of Minerals...

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