Hello visitor from USA USA - 60 visiting from China 26 China France 18 France USA 11 USA Germany 1 Germany Japan 1 Japan Russia 1 Russia Armenia 1 Armenia Singapore 1 Singapore
Free Join Now   B2B Chat Center
 
This Month's Highlights:
- PrintLabels (China): Print Labels, Stickers, Tags, Epoxy Resin Stickers http://www.inecreative.com
- Sayhi0307 (China): Shipping Rates From China, Air Freight Rate From China, Ocean Freight Quote, Shipping Cost, Shipping Price, Freight Quote http://www.sztaizhou.com
 
 
 

Gemological Gemstone Refractometer Built-in Led

Posted at: Offers to Sell and Export | Posted on: Mon 21 Jun, 2010 6:47 am |
 
gemological gemstone refractometer built led
Products Photos CatalogGemological Gemstone Photos Catalog



The GR-701, commonly known as Gemstone Refractometer, is the primary and most powerful tool in identify



and authenticate polished precious and semiprecious gemstones and observing the optical properties and the structure of gemstones. This model is just as good as the expensive models used in gemological institutes. With the aid of Contact liquid ( RI Fluid), that will create an optical contact between the glass and the gemstone, you can measure or test the Refractive Index of faceted stones, transparency or opacity, and its beauty, durability and scarcity. The refractive index ( RI) of a gemstone provides the single most important piece of information to a gemologist seeking to identify an unknown stone. Due to its chemical composition and crystallization structure, each gem has a typical refractive index. In fact, you can also use this tool to measure R.I. for many minerals in crystal form as long as the crystals have a flat and polished face. Through these parameters, you can determine whether the gem is a Single Refraction ( Isotropic) or Double Refraction ( Anisotropic or Birefringence) .

GR-701 offers you the worry-free, light and easy way to identify and/ or authenticate your most precious gemstones.

Buy Now!

Features:

* Convenient & easy to carry

* With built-in LED illumination that makes it a carry-and-use-it-anywhere device

* Comes with Automatic Temperature Compensation ( ATC) that let itself adjust to the climate

* A bottle of Refractive Index Fluid is provided

* Approved by strict quality and safety standards

* Undoubtedly durable and very reliable

Specifications:

* Measuring Range: 1.30 1.81 RI

* Minimum Graduation ( RI) : 0.01 RI

* Illumination: Internal LED illumination with momentary switch

* Size: 35mm x 63mm x 115mm

* Scale Division: 0.01 nD

* Weight: 0.4 kg

* Ranges of Application: Laboratory, Gemology

* Filter: Polarizing filter

* Power Source: 1.5V x3 button batteries

Operating Information:

* Open the upper cover then wash the gem and prism with alcohol.

* Lay the instrument on the worktable. Drop a little bit of special refractive oil onto the surface of prism and press it by a thin glass bar. ( Be sure not too much or too little)

* Make the ground surface of gem to be measured is close to the prism, press it again lightly, make refractive oil distributed evenly between the two surface. Then close the upper cover.

* Press the Led momentary switch, make sure that the internal light source is turned on when testing.

* Move the eyepiece up and down and adjust the diopter accordingly. By this time you can see a light/ dark boundary in the viewing field. The gradation ( shade) on which the boundary located is called the refractive index of gem.

* measuring methods:

o Remove the polarizer. Turn it onto eyepiece. Then turn the polarizer lightly. You can only read the refractive index value in one direction at a time because the polarizer only allow the light vibrated in one direction to pass through.

o Then turn the polarizer through 90, you can measure the refractive index value of the light vibrated at right angles to that mentioned above.

o Turn the gem in the same direction through small degree then turn the polarizer lightly according to above method, you can read the two refractive index values of the light vibrated at right angles to each other.

o Operate continuously until the gem is at 180 position to its initial position. From a number of groups of measured refractive index values you can find the maximum and minimum refractive index. The difference between the two values is the birefringence of gem.

Maintenance:

* After measurement, remove any dirt from the refractometer' s housing ( casing) then clean prism and the gem with alcohol to remove the refractive oil on it.

* Put back the refractometer into the box for protection.

* Remove the Battery from the Battery compartment if you are planning on not using the Refractometer for a long period of time to prevent leaks or molds that can damage your device.

Accessories included:

* Small Vial of 1.800 Refractive Index Oil

* Polarizing Filter

* 1.5V x3 button batteries

* Pouch Case

* Refractometer Index Reference List ( For 77 common gemstones, i.e. Calcite, Jadeite, Quartz etc.)

* User' s Manual

Packaging: Pouch Case

Warranty: 2 years warranty



Company Contact:

No member photo
Contact Name: Gary Tong
Company Name: Gain Express Holdings Ltd.
Email: Email
Tel: +852 2362-7800
Fax: +852 2362-7838
Street Address: Flat A, 10/F Yuey
Kong Centre, 45-47 Bulkeley Street
Hunghom, Kowloon, Hong Kong
Website: http://www.gainexpress.com
Member name: GainExpressHoldingsLtd
Country: Hong Kong-HK Hong Kong
Member Since: 18 June 2010
Total Leads: 118 GainExpressHoldingsLtd Import Export Business Leads
Business focus: Refractometer, Loupe, Diamond, Moissanite Identification, Meters, Testers
Chat:
Verify: Safe Import Export Tips
 
 
 

Similar LeadsSimilar Suppliers And Manufacturers Import Export Trade Leads

Start Import Export Stories Import Export Startup Stories

Share Your Story & Get Listed at StartImportExport.com

 
 
 
TradersCity Free Import Export Trade Leads B2B Board  Offers to Sell and Export
 
TradersCity.com shall not be held liable for any user posted/submitted content including but not limited to trade leads, profiles, images, and any other data. TradersCity.com does not and did not verify any of users posted/submitted data nor is implicitly or explicitly recommending these business offers. TradersCity does not verify truthfulness, accuracy, completeness, nor legality of any businesses, services, and leads posted here. TradersCity does not represent Sellers or Buyers in any transaction between users of the website and is unable to make any opinion in regard to their performance in any transaction. TradersCity neither guarantees nor undertakes in any dispute between sellers and buyers. Protect your business from fraud by trading safely