Gemstones

Also known as Gems, Jewels and Precious Stones. Most gemstones are classified as minerals with rare exceptions such as pearls, amber, coral and jet.

Contents 1 Types of Gemstones 1.1 Amber 1.2 Jet 2 History 3 Gem Identification 3.1 Issues 4 Imitations 5 Treatments

Types of Gemstones

Amber

Although found in the earth Amber is was produced by living organisms and is not considered a mineral.

Jet

Although found in the earth Jet is was produced by living organisms and is not considered a mineral.

History

Throughout history people have always admired the beauty of gemstones and due to their rarity, placed have value on them.

Gem Identification

Methods used to identify gems from similar looking species, separate them from imitations and to recognize enhancements and treatments. Since most gemstones are minerals that have a uniform chemical composition, giving them a consistent set of physical and optical properties, accurate measurement of these properties greatly helps gem identification.

Issues

Largest issues of gem identification are failing to consider all possibilities and misinterpreting test results.

Imitations

High value of gems have led to various forms of imitations over the years.

Treatments

Treatments developed to raise apperent value of stones.