Ads
related to: gem pro refractometerwalmart.com has been visited by 1M+ users in the past month
Search results
Results from the WOW.Com Content Network
Herbert Smith's refractometer. George Frederick Herbert Smith CBE (26 May 1872 – 20 April 1953) was a British mineralogist who worked for the British Museum (Natural History). [1] He discovered the mineral paratacamite in 1906, and developed a jeweller's refractometer for the rapid identification of gems. [2]
The refractometer is used to help identify gem materials by measuring their refractive index, one of the principal properties used in determining the type of a gemstone. Due to the dependence of the refractive index on the wavelength of the light used ( i.e. dispersion ), the measurement is normally taken at the wavelength of the sodium line D ...
A specialty of A.Krüss Optronic is their program of gemological instruments and equipment. It includes gemological magnifiers and microscopes, special spectrometers and gem-refractometers, and complete battery-operated portable laboratories for field operation.
Traditional handheld refractometer. One test to determine the gem's identity is to measure the refraction of light in the gem. Essentially, when light passes from one medium to another, it bends. Blue light bends more than red light. How much the light bends will vary depending on the gem mineral.
Refractometers are frequently used by grape growers and kiwifruit growers for Brix testing of sucrose levels in their fruit. Refractometry is also used in the gelatin industry. To convert the RI of a gelatin sol (reported in Brix) to a gelatin concentration, one need only multiply by eight-tenths (0.8). A sol with a 10.0 RI would therefore be 8 ...
Traditional handheld refractometer This page was last edited on 29 March 2013, at 09:33 (UTC). Text is available under the Creative Commons Attribution-ShareAlike ...
Ads
related to: gem pro refractometerwalmart.com has been visited by 1M+ users in the past month