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Quick Details

  • Place of Origin: Fujian, China (Mainland)
  • Brand Name: HEDAO
  • Model Number: GR-004
  • Size: 35mm x 63mm x 115mm
  • Weight: 0.4 kg
  • Measurement Accuracy: (RI) 0.01 RI
  • Min. Div.: 0.01 nD
  • Brix Range: digital gem refractometer
  • Brix Min. Div.: digital gem refractometer
  • Measurement Range: 1.30 - 1.81 RI
  • Power Source: 3 x AG13 1.5V button batteries
  • key word: digital gem refractometer
  • Filter: Polarizing filter
  • Illumination: Internal Light Source with momentary/power switch
  • color: Black
  • URL: www.hedao-supply.com
  • website: www.fjhedao.en.alibaba.com
  • name: Built in light source digital gem refractometer & jewelry tool
  • oem: yes
  • hot sell: yes

Packaging & Delivery

Packaging Details Export cartons for Built in light source digital gem refractometer & jewelry tool
Delivery Time in 7-10 days

Built in light source digital gem refractometer & jewelry tool



Product Description



1.Gemological Refractometer
2.1.30-1.81 nD
3.Internal LED illumination
4.Laboratory, Gemology
5.Polarizing filter  



Measuring Range1.30 - 1.81 RI
Minimum Graduation(RI) 0.01 RI
IlluminationInternal Light Source with momentary
Dimension35mm x 63mm x 115mm
Scale Division0.01 nD
Weight0.4 kg
Ranges of ApplicationLaboratory, Gemology
Filter Polarizing filter
Power Source3 x AG13 1.5V button batteries
HEAVY-DUTY and Built to lastyes
powerthree (3) 1.5V button type batteries


  • Convenient & easy to carry
  • With built-in Light Source that makes it a carry-and-use-it-anywhere device
  • Comes with Automatic Temperature Compensation (ATC) that let itself adjust to the climate
  • Approved by strict quality and safety standards
  • Undoubtedly durable, very reliable and assures accurate testing results
  • Comes with batteries, leather pouch case, polarizing filter, index oil, index reference list and user's manual




 This model is commonly known as Gemstone Refractometer, is the primary and most powerful tool in identify and authenticate polished precious and semi-precious 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). Plus an option to get an extra bottle of 1.800 Refractive Index Oil just by adding a small amount to your order, see Available Options.




Product Description



Packaging Detail:  plywood case suitable for long sea transportation, Standard export packing or neutral                                        packing if needed,standard export packing,carton box, wooden case or upon request,                                        packing carefully.




Delivery time:  within 10 days after payment






Shipping & Payment




Our Services


1. 100% quality guarantee
2. Quick delivery time
3. OEM service
4. Promptly reply you within 24 hours
5. We treat clients as friend .Giving best service and sincere greetings


Why choose us


1. We have our own factory with strong R&D center and QA team which can make sure your goods c an be sent out on time and in superior quality. 



2.  We have experienced and dedicated core members to offer you professional and reliable before-sales and after-sales service



3.  We have purveyed customers with the lowest wholesale price.



4. High quality, quick response and good service will help you to make your business better. 




Company Information


Fuzhou Hedao Trade Co., Ltd., located in Fuzhou, Fujian, specializes mainly in exporting all kinds of Refractometers, PH/TDS/EC/ORP Meter, Thermometers, Moisture Meters, Distance Meters, Scales,

Gauges, Microscopes, and other  Meters and Testers.

Our aim is"Focusing on Customers".

We are customer oriented and customer satisfaction has always been our priority.


QA/QC Introduction

we have our own inspectors ensures quality control  for In-house check.

Raw material inspection, random inspection and final inspection during packaging are all conducted before final delivery. 

We have purveyed customers with the lowest wholesale price. High quality, quick response and good service will help you to make your business better.

We are famous for perfect after-sale service. In fact, our product is reliable and high quality, but if you find any question when you start to use it, just feel free to let us know. We will try our best to solve your question and service you well online at any time. 


visual display






Q: How do you guarantee the quality?


A: One year's guarantee from date on B/L. Normally. If it's quality problem, we promise to return goods or funds.




Q: Is OEM available?


A: Yes, all goods can be custom made by your requirements, including packing, LOGO print, etc.




Q: Can we buy 1 pc for sample testing?


A: Yes, we are glad to send 1pc for quality testing if we have stock of the model you required.




Q: How to deliver the goods for trial order or small order?


A : For small order, we prefer to choose international express, such as DHL, TNT, EMS which are faster and more convenient for customer. Also, we cooperate with an express agent that can give us a big discount for express fee which is much lower than that quoted by official. For the goods with detachable battery, the express fee can be lower down if the goods is sent out without battery.




Q: What kind of payment your company accept? 


A : T/T , Western Union,MoneyGram, Paypal , ect.




Q: If we have not found the model from website, what should we do?


A: Please email us with description and picture of the product, we research and develop new model every month, and some of them maybe have not been uploaded in website immediately. But If this is a new products for us, we can develop it for you after get all detailed information about your product.


Transaction History of the Supplier

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Transaction Overview


Transaction Details

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China (Mainland) | Trading Company
Transaction Level:
Supplier Assessments:
8 Transactions 70,000+
The supplier’s transactions conducted via Alibaba.com in the past 6 months.
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $300,000
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