Gemology 101

5 Electromagnetic Spectrum

July 12, 2011By 0 Comments
5 Electromagnetic Spectrum

Here is a short introduction in layman’s terms on what is an Electromagnetic Spectrum.  A simple knowledge of this is important in the study of gemstones and gemology. The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation.  Hence, the “Electromagnetic Spectrum” of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed […]

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5 The Deep Carbon Observatory

March 27, 2011By 0 Comments
5 The Deep Carbon Observatory

The Deep Carbon Observatory A project to reveal more about all the carbon on Earth THE carbon cycle is the stuff of school books. It is a familiar tale of photosynthesis, forests, farming and fossils fuels. Understanding this cycle is important, both because it sustains life on Earth and because it is bound up with […]

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4 Toughness of a Gemstone

January 19, 2011By 0 Comments
4 Toughness of a Gemstone

Usually when gemstones are defined as durable, they include two distinct traits, hardness and toughness.  These terms are not the same and people are often confused between these two. A mineral’s hardness is its ability to resist scratches or abrasions, and hardness is defined on the Moh’s Hardness Scale from 1 to 10, where diamond […]

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3 Refractive Index – Optical Property

July 24, 2010By 45 Comments
3 Refractive Index – Optical Property

The Refractive Index (RI) is one of the most important optical property of a gemstone.  Once the RI of a gemstone is known, one can easily identify the gemstone, given another few tests to confirm its identity. Let us go back to the fundamentals (Read here for fundamentals) to understand what is Refractive Index. Reflection […]

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1 Important To Learn Fundamentals First

July 11, 2010By 81 Comments
1 Important To Learn Fundamentals First

Fundamentals In whatever field you are undertaking, I believed that it is very important to learn the fundamentals.  Even for that matter that you are only an amateur venturing in a new field, it is always learning the basics well that will give you a strong footing and foundation in your future endeavors. Yes, understand […]

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2 Specific Gravity

June 16, 2010By 35 Comments
2 Specific Gravity

The SG of a mineral provides valuable information on the identity of a gemstone.  SG seldom overlaps and is a fairly constant. Firstly let us understand SG from a layman’s point of view. SG is the comparison of the weight of a specific gemstone to the weight of an equal volume of water.  The chart […]

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