Gem Refractometer Gemological Gemstone Built-In LED Light for GIA testing

Gemological Gemstone Refractometer with Built-in LED Light & ATC (1.30–1.81 RI)

Identify, authenticate, and test gemstones with accuracy using this professional-grade Gem Refractometer. Designed for gemologists, jewelers, and rockhounds, this instrument accurately measures the Refractive Index (RI) of polished precious and semi-precious gemstones to determine their optical properties, structure, and authenticity.

KEY FEATURES

• Built-in LED Light Source: Features an integrated internal light source (589nm standard wavelength) with a momentary switch, allowing you to test stones anywhere without requiring an external lamp.

• Automatic Temperature Compensation (ATC): Automatically adjusts to room and ambient temperatures for consistent, accurate readings.

• Wide Measurement Range: Measures Refractive Index from 1.30 to 1.81 RI with a 0.01 nD scale division.

• Durable Build: Constructed with a heavy-duty metal body and scratch-resistant glass optical prism for long-lasting laboratory or field use.

• Identify Birefringence: Easily test whether a stone exhibits Single Refraction (Isotropic) or Double Refraction (Anisotropic / Birefringence).

TECHNICAL SPECIFICATIONS

• Measuring Range: 1.30 – 1.81 RI

• Minimum Graduation: 0.01 RI

• Filter: Polarizing filter included

• Power Source: 3x 1.5V button cell batteries (included)

• Dimensions: 30mm x 70mm x 130mm

• Weight: 0.4 kg

• Color: Black 

WHAT'S INCLUDED IN THE BOX

• 1x Gemological Refractometer

• 1x Polarizing Filter

• 1x Protective Storage Case

• 3x 1.5V Button Cell Batteries

• 1x User Manual

OPERATING INSTRUCTIONS

1. Clean the gemstone and optical prism thoroughly with alcohol.

2. Place a small drop of refractive index (RI) contact fluid onto the center of the prism glass.

3. Place the flat, polished surface of the gemstone face-down onto the fluid and close the cover shade.

4. Press and hold the internal light switch.

5. Look through the eyepiece and adjust the focus diopter until the light/dark boundary line is sharp.

6. Read the Refractive Index value indicated on the internal scale where the shadow line UsPaymentShippingReturnsAbout Us

   We accept PayPal, major credit cards, and other methods supported by Managed offer FREE shipping on all orders!
   

   
   

   Your order will be dispatched within 24 hours receiving payment and you should expect to receive it two to five days after dispatch. you are not completely satisfied within 30-days of your purchase,  you can return the product and get a full refund or replacement (your choice).  Our return process is managed and very easy to follow.  We will be responsible for the return shipping cost of the damaged or wrong items.

   
   

   We are a family owned business located in the beautiful western Pennsylvania. We began as a wholesale jewelry and fashion importer. After successfully selling a few precison jewelry scales on a major online marketplace in 2009, we decided to transform into a professional weight scale distributor. Then soon expanded into other great product categories. 
   

   Gemological Gemstone Refractometer with Built-in LED Light & ATC (1.30–1.81 RI)

    

   Identify, authenticate, and test gemstones with accuracy using this professional-grade Gem Refractometer. Designed for gemologists, jewelers, and rockhounds, this instrument accurately measures the Refractive Index (RI) of polished precious and semi-precious gemstones to determine their optical properties, structure, and authenticity.

    

   KEY FEATURES

   • Built-in LED Light Source: Features an integrated internal light source (589nm standard wavelength) with a momentary switch, allowing you to test stones anywhere without requiring an external lamp.

   • Automatic Temperature Compensation (ATC): Automatically adjusts to room and ambient temperatures for consistent, accurate readings.

   • Wide Measurement Range: Measures Refractive Index from 1.30 to 1.81 RI with a 0.01 nD scale division.

   • Durable Build: Constructed with a heavy-duty metal body and scratch-resistant glass optical prism for long-lasting laboratory or field use.

   • Identify Birefringence: Easily test whether a stone exhibits Single Refraction (Isotropic) or Double Refraction (Anisotropic / Birefringence).

    

   TECHNICAL SPECIFICATIONS

   • Measuring Range: 1.30 – 1.81 RI

   • Minimum Graduation: 0.01 RI

   • Filter: Polarizing filter included

   • Power Source: 3x 1.5V button cell batteries (included)

   • Dimensions: 30mm x 70mm x 130mm

   • Weight: 0.4 kg

   • Color: Black 

    

   WHAT'S INCLUDED IN THE BOX

   • 1x Gemological Refractometer

   • 1x Polarizing Filter

   • 1x Protective Storage Case

   • 3x 1.5V Button Cell Batteries

   • 1x User Manual

    

   OPERATING INSTRUCTIONS

   1. Clean the gemstone and optical prism thoroughly with alcohol.

   2. Place a small drop of refractive index (RI) contact fluid onto the center of the prism glass.

   3. Place the flat, polished surface of the gemstone face-down onto the fluid and close the cover shade.

   4. Press and hold the internal light switch.

   5. Look through the eyepiece and adjust the focus diopter until the light/dark boundary line is sharp.

   6. Read the Refractive Index value indicated on the internal scale where the shadow line crosses.

   Payment

   We accept PayPal, major credit cards, and other methods supported by Managed offer FREE shipping on all orders!
   

   
   

   Your order will be dispatched within 24 hours receiving payment and you should expect to receive it two to five days after dispatch. you are not completely satisfied within 30-days of your purchase,  you can return the product and get a full refund or replacement (your choice).  Our return process is managed and very easy to follow.  We will be responsible for the return shipping cost of the damaged or wrong items.

   About Us

   
   

   We are a family owned business located in the beautiful western Pennsylvania. We began as a wholesale jewelry and fashion importer. After successfully selling a few precison jewelry scales on a major online marketplace in 2009, we decided to transform into a professional weight scale distributor. Then soon expanded into other great product categories. 
   

   Gemological Gemstone Refractometer with Built-in LED Light & ATC (1.30–1.81 RI)

    

   Identify, authenticate, and test gemstones with accuracy using this professional-grade Gem Refractometer. Designed for gemologists, jewelers, and rockhounds, this instrument accurately measures the Refractive Index (RI) of polished precious and semi-precious gemstones to determine their optical properties, structure, and authenticity.

    

   KEY FEATURES

   • Built-in LED Light Source: Features an integrated internal light source (589nm standard wavelength) with a momentary switch, allowing you to test stones anywhere without requiring an external lamp.

   • Automatic Temperature Compensation (ATC): Automatically adjusts to room and ambient temperatures for consistent, accurate readings.

   • Wide Measurement Range: Measures Refractive Index from 1.30 to 1.81 RI with a 0.01 nD scale division.

   • Durable Build: Constructed with a heavy-duty metal body and scratch-resistant glass optical prism for long-lasting laboratory or field use.

   • Identify Birefringence: Easily test whether a stone exhibits Single Refraction (Isotropic) or Double Refraction (Anisotropic / Birefringence).

    

   TECHNICAL SPECIFICATIONS

   • Measuring Range: 1.30 – 1.81 RI

   • Minimum Graduation: 0.01 RI

   • Filter: Polarizing filter included

   • Power Source: 3x 1.5V button cell batteries (included)

   • Dimensions: 30mm x 70mm x 130mm

   • Weight: 0.4 kg

   • Color: Black 

    

   WHAT'S INCLUDED IN THE BOX

   • 1x Gemological Refractometer

   • 1x Polarizing Filter

   • 1x Protective Storage Case

   • 3x 1.5V Button Cell Batteries

   • 1x User Manual

    

   OPERATING INSTRUCTIONS

   1. Clean the gemstone and optical prism thoroughly with alcohol.

   2. Place a small drop of refractive index (RI) contact fluid onto the center of the prism glass.

   3. Place the flat, polished surface of the gemstone face-down onto the fluid and close the cover shade.

   4. Press and hold the internal light switch.

   5. Look through the eyepiece and adjust the focus diopter until the light/dark boundary line is sharp.

   6. Read the Refractive Index value indicated on the internal scale where the shadow line crosses.