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 […]
Author Archives: Dr Shihaan Larif
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. […]
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 […]
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 […]
I have put this topic under ‘Guide to Buying Diamonds & Jewelry’, for buyers that are curious to know what happens behind the scene in a gemological laboratory. Diamond and jewelry buyers can also learn about the commonly used tools by jewelers and dealers. Please do not confuse gemmological instruments with tools and accessories used in gemmology […]
One should be careful when using the term ‘diamond cut’ as gemmologists use this term to refer to the proportions of the diamond such as width, depth and symmetry of the facets. In other words it refers to the quality of the ‘cutting & polishing’ of the diamond which is covered in my article Cut of […]
1) Sealed Diamond Reports Many laboratories these days provide a diamond sealing service after the diamond is tested. A sealed diamond report by the International Gemological Institute (IGI). Usually upon request the stone is sealed together with a reduced copy of the diamond report. This assures the consumers, diamond dealers, jewelers and other professionals in […]
Dr Shihaan Larif Part 1 A diamond grading certificate is defined as a document which proves that some of the physical properties of the diamond has been tested by professionals in an independent laboratory. Nowadays most individuals who shop for diamonds ask for diamond certificates before buying the stone. This is a very good trend […]
In this section I will cover the answers to frequently asked questions asked by our clients, before they buy diamond jewelry. 1) Is it important to learn, educate yourself and ask questions about diamonds before you buy? Try to learn as much as you can about diamonds before buying. It is important to learn about […]
The term clarity of a diamond refers to the size and the number of inclusions in the diamond. The inclusions are also referred to as inperfections of the diamond. Tiny inperfections occur in almost all natural diamonds. These flaws are present due to the incredible amount of pressure during the formation of the diamond billions […]