jewelry refractometer for gem testing

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Supply Ability 1000 Piece / Pieces per Month
Port Shenzhen
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Product Details

Place of Origin	Guangdong, China	Brand Name	Fable
Model Number	FGR-003	Size	22218280 mm
Weight	1 KG	Measurement Accuracy	0.003
Min. Div.	0.001	Measurement Range	1.35-1.85

Product Description

Specifications

jewelry refractometer for gem testing
Testing range: 1.35-1.85.
High hardness CZ (cubic zirconia) testing table

$jewelry refractometer for gem testing$

$jewelry refractometer for gem testing$ $jewelry refractometer for gem testing$

$jewelry refractometer for gem testing$

jewelry refractometer for gem testing

Specifications

built in light

A Gem Refractometer measures the refractive index of your gems. Besides the RI, a refractometer will also give you the birefringence and optic sign. When possible, it is easier to obtain the optic sign from a polariscope. However, that can’t always be done, so you need the refractometer as an alternate means to determine the optic sign when necessary.
As the refractive index of the gemstones are fixed, the RI value becomes a very important reference data; naturally, a Gem Refractometer is absolutely essential for gem identification.

function :

Hard CZ measuring prism.
Scale range:1.35-1.85.Accuracy: ±0.003
Professional optical design, Aluminum alloy table and Internally installed the monochromatic light.
There are two ways of inputing the voltage:7 AA batteries and DC3V direct current suply(AC100—240V).
2ml refringent oil(1.78±0.005) with unique design of the bottle(Proprietary technology ZL200620096730.7),
It is much safer ,much ecnomical and more convinent.

refractive index of the gemstones

name	R.I.	birefringence	name	R.I.	birefringence
Opal	1.42-1.45		Apatite	1.634-1.638	0.004
Fluorite	1.45		Peridot	1.654-1.695	0.035
Glass	1.51-1.82		Jadeite	1.66±
Sodalite	1.483-1.487		Diopside	1.675-1.701	0.026
Lapis lazuli	1.50 or 1.67		Syn.spinel	1.728±
Moonstone	1.52-1.54		Chrysoberyl	1.746-1.755	0.01
Chalcedony	1.53-1.54		Hydrogrossular	1.730-1.740
Lolite	1.544-1.553	0.01	rundum	1.762-1.770	0.008
Crystal	1.544-1.553	0.009	Almandite	1.79±0.03
Beryl	1.56-1.59	0.008	Ruby&Sapphire	1.762-1.770	0.008
Turquoise	1.61-1.65		Zircon	1.925-1.984	0.059
Nephrite	1.61±		CZ	2.08-2.20
Topaz	1.61-1.640	0.009	Strontium titanate	2.409
Tourmaline	1.620-1.644	0.02	Diamond	2.417
Anslusite	1.634-1.643	0.01	Spinel	1.718-1.785
Obsidian	1.50±

Contact Us

Shenzhen Fable Jewellery Technology Co., Ltd.: Contact nameCelina K
Chat Now; Phone86-755-89583846-809; AddressPinghu, Shenzhen, Guangdong

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jewelry refractometer for gem testing

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