Category Archives: Education

Abernethy Pearl – Little Willie Pearl

Open FREE Unlimited Store                   Join Our Newsletter Dr. Shihaan M. Larif Origin of Name The Abernethy Pearl, a 44-grain extraordinary freshwater pearl discovered in the River Tay in Scotland from a freshwater Unionoidae mussel species known as Margaritifera margaritifera, once common in the rivers of Scotland, gets […]

Famous Pearls II

Marilyn Monroe Pearl Necklace Mary Todd Lincon’s Seed Pearl Jewelry Suite Maharani Jindan Kaur Emerald and Seed Pearl Necklace Melo Melo Pearls Michael Jackson’s Victory Tour Pearl and Crystal Studded Costume Shirt Multi- Gemstone, Diamond & Cultured pearl fringe necklace & earrings Natural Black Pearl Ring Natural Pearl, Diamond and Ruby Pendant Necklace Natural Pearl […]

Famous Pearls- Page 1

Important tables on famous pearls of the world Abernethy Pearl Anna Thomson Dodge/ Catherine The Great Pearl Necklace Anne Boleyns Pearls Antique Natural Pearl & Diamond 5 Row Necklace Aphrodite Pin Arco Valley Pearl Antique Pearl and Diamond Pendent Brooch Barbara Hutton / Marie Antoinette Pearl Necklace Bao Dai/ Sunrise Pearl- Worlds Largest and Roundest […]

Gemstone Geographic Origin Determination with special reference to Blue Sapphires

Criteria used in determining country of origin of blue sapphires Identification of inclusions is the first criterion used by gemologists in determining the country of origin of a blue sapphire.The presence of inclusions that are unique to certain sapphire producing regions, can be easily used in identifying the source, eg. the presence of needle-like pargasite […]

Diamond Cutting Machines, Gemstone Drilling Machine etc.

Gemstone Drilling Machine Gemstone Drilling Machine The gemstone drilling machine is useful in making beaded gemstone necklace, earrings and other jewelry items. One should always wear safety glasses when using a gemstone drill. The drill should be held perpendicular to the stone. A wrong angle can causecracking at the entry or exit point. Gemstone Drilling […]

Tools and Accessories used in Gemology & by Jewelry Traders

Ring Sticks Ring Sticks Ring sticks comes in various standard sizes such as for U.S.A scale, Indian scales and European scales. Ring Stick Photo above,C.C Ring stick with U.S scale and diameter in mm. Photo above,C.C Ring sizes and ring sizing will be covered on a dedicated page. Ring Sizers Ring Sizers Ring sizers also […]

Instruments used in gemology Part IV- Dr Shihaan’s Guide

Click here to go to Part III 12) Electronic Diamond Tester There are many different types of electronic diamond testers in the market. Electronic diamond testers are portable and battery powered   Presidium Electronic Diamond Tester All electronic diamond testers test the ability of the stone to conduct heat. That is they test the thermal conductivity. […]

Instruments used in gemology Part III- Dr Shihaan’s Guide

Click here to go to Part II Part III of the introduction to instruments used in gemology covers microscopes, ultraviolet lamp, heavy liquids, hardness pencils and weighing scales. 7) Microscopes Kruess Optronic Diamond and Gemstone Microscope with inbuilt fiber optic light source.This microscope can be used for gemstone analysis with immersion technique. The microscope is probably […]

Instruments used in Gemmology-Part II- Dr Shihaan’s Guide

In part II, I will cover four instruments dichroscope, chelsea color filter and polarascope. Click here to go back to Part 1 4)Dichroscope Transparent gemstones may be tested using a dichroscope. A dichroscope is a portable pocked instrument used by gemologists. It is very useful especially in the feild. Dichroscopes can be used for both rough and […]

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