Essential Instrument - Refractometer - Used Daily In House

Item Information

Dimensions (mm) not provided
Weight (carats) not provided
Certified Gemstone


Gemstar Sale

See "Buy Now" for 30% savings on hundreds of Gemstar items.


Looks complicated, it is not.

Fun, lots of tech support and guarantees value of items that you purchase.



Ours is silver, yours, will be black. Life-expectancy is unlimited.


Operates on button batteries.


Place tiny amount of Refractometer fluid on rectangular "site". Turn "on", close top, look through viewport.


Includes refractometer fluid.

Yes, it is possible to test the Gems that you receive for authenticity.

Simple instrument, easy to use, fun and comes with "tech support".



Guaranteed to be 100% delightful. 

Guaranteed to be natural.

100% money back if not thrilled with this beautiful gem. 

Gemstar makes substantial investments

in photographic equipment to allow you

the best possible view of your purchases. 




For Gemstar’s feed back………… press here 




We take great care to inspect and accurately represent all stones placed for sale. Gemstar uses the following to insure the accuracy of our offerings: Polariscope, Refractometer, Chelsea Filter, 10 To 60 Power Gemscope, Digital Calipers, High Megapixel Digital Photography, Assorted additional equipment. All Gemstar items are guaranteed.



On a very, very infrequent basis, stones of many species are treated with  laboratory "hocus pokus". All stones are examined under 30 power magnification for any trace of these treatments. Stones that show treatment are clearly stated.

Stones of many types can be laboratory created.  Our equipment is designed to help to detect these.  Gemstar never sells laboratory imitation stones, only natural stones that have beauty and are suitable for elegant jewelry applications where the fabricator wants genuine, valuable, natural materials that compliment their hard work and effort.



Nothing is more disappointing than to get something that is not accurately represented. All photos are of the actual stones and are never computer enhanced. Any details that we become aware of that effect the quality, durability or value of the Stones are clearly stated.



Shipping is free for all items. Gemstar reserves the right to combine purchases into one assignment for convenience and simplicity. All shipments include descriptive information.



Should you ever be disappointed with an item purchased from Gemstar, you have a 10 day period to provide notification. Should you elect to submit stones for independent certification this period can be extended for an additional 45 days provided that you notify us of intent to certify within the initial 10 days period.

All items have an unconditional money back guarantee subject only to the terms above.



We love positive feedback and will make every effort to insure that you are pleased with your purchase. If you like the service, and the materials you receive, please tell everyone. If you have concerns please notify us and allow us to make you a happy client.

 If you get to the Big Island of Hawaii come visit with us.


Good luck bidding. (Look forward to outstanding merchandise and superior service.)




HERE ARE THE Manufacturer's Specs:



Each gem has a typical refractive index due to its chemical composition and crystallization structure. The gem refractometer is a primary and useful tool in identifying and authenticating polished precious and semi-precious gemstones as well as observing the optical properties and structure of gemstones. It can be used to measure R.I. to many minerals in crystal form as long as the crystals have a flat and polished face. The included contact liquid or RI oil is needed to create contact between the stone and the prism glass to measure or test the Refractive Index of faceted stones, its transparency or opacity, beauty, durability and scarcity. Through the parameters you can check if the gem is an anisotropic or an isotropic stone, uniaxial or biaxial photopositive or photonegative. The built-in LED light also aids in idenfying the refractive index (RI), quality and category of gemstones. Moreover, this gem refractometer can also be used to measure the index of double refraction.

Special Features

Heavy duty, highly accurate and reliable

Compact design and lightweight


Accuracy : ±0.02 RI

Illumination : Built-in LED illumination with on/off switch

Measuring range : 1.30 - 1.81 RI

Minimum division : 0.01 RI

Contact Oil: FULL SCALE refractive index (1.81 RI) oil (included in 2ml bottle)

Filter : Polarizing filter

Power source : 3 x 4.5V button battery (included)

Item size : approx. 115 x 35 x 63mm

Set Includes

1 x Gem Refractometer (main unit)

1 x 2ml bottle FULL SCALE refractive index (1.81 RI) oil

3 x 4.5V button battery

1 x Soft carrying bag

Instruction manual

Standard colored factory packaging box


Looks complicated, it is not.

Fun, lots of tech support and guarantees value of items that you purchase.

7h 47m 35s

Buy Now $255.00
Make an Offer
Shipping $0.00
21 Days via Standard Shipping
0 bids placed so far
Add to Watch List Ask a Question * All prices in USD

Audit Information

The Gemstone Sheriff program allows our members to request an audit on any auction, which is completed by an independent gemologist who assesses the accuracy of the item description and pictures.

Request Audit

Pricing & Details

Bid Increment $1.00
Starting Bid $255.00
Auction ID 286834
Watchers 2 watching
Viewed 774 times
Starts 22nd Sep 2017 9:02pm PDT
Ends 23rd Sep 2017 9:00pm PDT

Shipping & Insurance

Provider Shipping Transit
Standard Shipping $0.00 21 Days
Shipping Insurance all providers $7.55 (optional)

About Gemstar