GEM REFRACTOMETER + DIAMOND + MOISSANITE TESTER , Set K

These combined tools will bring you all the FEATURES and RELIABILITY of a diamond selector, gemological refractometer and moissanite and diamond tester. These tools are profesionally made with the finest and high quality selected materials. The set can be used with loose stones, stones in rings, pendants, earings, bracelets, watches, etc. The testers that will leave you no doubt. The perfect combination of highly reliable, superior quality and accurate testers for distinguishing real diamonds from simulant stones. The set includes Gemological Refractometer with Built-in Light Source and Index Oil, Diamond & Moissanite Tester all in one package. Each device is made with precision and quality to insure accuracy and durability. JEM-II, a diamond selector, can distinguish a diamond from other stone simulants - like fake crystal or simulants such as cubic zirconium - but not moissanite, this is because moissanite has similar thermal conductivity to that of diamond. After the stones has been tested and filtered by a diamond selector a moissanite tester, JEM-III, is needed to rule-out the moissanite from diamond is highly suggested or recommended. Doing so makes you 100% sure that you're paying for the right stone. Anyone, even without training or previous experience in the Jewelry and Diamond trade, can use this moissanite tester and easily receive immediate & reliable identification of genuine diamonds. Stones as small as 2pt, rough or polished, unmounted or mounted, can be tested under these devices in any type of setting.   1) GEM REFRACTOMETER with Built-in Light Source and Index Oil (GR-701): The GR-701, commonly known as Gemstone Refractometer, is the primary and most powerful tool in identifying and authenticating polished precious and semiprecious gemstones and also observing the optical properties and the structure of gemstones. This model is just as good as the expensive models used in gemological institutes, it has a built-in light source and with the aid of the Contact liquid (RI Fluid), which creates an optical contact between the glass and the gemstone, you can measure or test the Refractive Index of faceted stones, its 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. Features: 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 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 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 sure the ground surface of gem to be measured is close to the prism, press it again lightly, let the refractive oil be evenly distributed between the two surfaces then close the upper cover. Press the light 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: 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 allows the light vibrated in one direction to pass through. Turn the polarizer through 90°, you can measure the refractive index value of the light vibrated at right angles to that mentioned above. 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. 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 the 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 (24 months) The Product                                                                 Included: Refractometer Index Reference List i.e. Jadeite Refractometer Index : 1.660 - 1.680 Reflective Index on PRM / PDT : 32 - 36   back to top           2) Diamond Selector with Ultraviolet Light (JEM-II): This diamond selector doesn't react on stones like fake crystals, or simulants such as cubic zirconium, when the probe touches the surface. It is the easiest answer for the vast majority of retail jewelers, pawn brokers and chain stores when faced with the decision of which diamond selector to buy. Why? Because it works reliably and share the most advanced diamond selector technology on the market. The JEM II is a "touch and tell you" device that utilizes the feature of high thermal conductivity of diamond. It effectively and quickly distinguishes natural diamond from all models of diamond simulants and metals, except synthetic Moissanite which has similar thermal conductivity to Diamond. There are some diamonds in the market these days which the diamond selector detects even if the diamond is not the genuine one.  Have a most reliable & user friendly diamond selector, get the JEM-II diamond selector! Features: Equipped with ultraviolet light to test fluorescent reaction of stones Flexible calibration with multi Level Meter Volume to match different sizes of stones An option to use or connect with A/C adaptor (not included) for long time indoor use Most compact design and low battery consumption Emit audible sounds to give warning buzzer if the probe touches metal surface Audible and visual indicator of genuine diamond Powered by a FREE replaceable DC 9V battery With a single press of a button it can accurately and precisely: Quickly distinguishes authentic diamond from all models of diamond simulants and metals, except Moissanite and; Distinguish stones as small as 2pt Supplied with vinyl pouch, testing platform for loose stones and a comprehensive instruction manual best utilize JEM-II Brand new and unused Specifications: Working Voltage: DC 9V, 6F22 battery, or AC adaptor (110V-240V, DC 9V, optional & not included) Probe Warm-up Time: about 25sec Working Time: about 5 hours for continuous use Suggested Working Temperature: 18°C to 30°C Size: 168mm(L) x 31mm(W) x 21mm(D) Net weight: 55g Accessories included: FREE DC 9V, 6F22 battery Vinyl Leather Pouch Case Heavy duty Testing Platform Operating Information : PREPARATION Insert 6F22 9V battery into tester. Move the Slide Switch to Diamond and the Power Light will light up in red, wait for about 25 seconds for testing probe to be heated, the Ready Light will light up in green. At this time, please make sure the LED level meter first bar is lighted if not, just adjust the Level Meter Volume to set the first bar lighted, then it¡¦s ready for testing. TESTING Use gem cloth to do normal cleaning work on stones to be tested. For mounted jewelry, please hold the jewelry with one hand while the other hand is holding the diamond selector keeping at least one finger touching the Electricity Conductive Panel of the diamond selector then gently apply the testing probe to the stone to be tested perpendicularly. For loose stone, stone should be placed on loose stone testing platform. Hold the testing platform on one hand while the other hand is holding the diamond selector keeping at least one finger touching the Electricity Conductive Panel of the diamond selector then gently apply the testing probe to the stone to be tested perpendicularly. If LED lights up to red zone with three periodic beep sound, then the stone that is being tested is a diamond. If a simulant, all LED bars don¡¦t light up or it lights up to the green or yellow zone only (it varies from different models of simulant). And a continuous beeping sound will be heard if the probe touches the metal part of the object to be tested such as rings and earrings. Recommended testing environment temperature is from 18°C to 30°C. Stone temperature should be the same as environment temperature. Environment temperature exceeding to 35°C will cause incorrect testing results. Replace battery immediately as soon as red light dims. When testing small stones (like 10pt below), it is recommended to take off the diamond from body and let them cool down to room temperature (from 18°C to 30°C) before conducting a test. Small stones attached to human body have higher temperature which causes incorrect results when put on test. To test the fluorescent reaction of stones under ultraviolet light, move the Slide Switch to Ultraviolet to light up the ultraviolet LED. AC adaptor (110V-240V, DC 9V) is recommended (not included) for long time indoor operation. Always set the Slide Switch to OFF position after every use. It doesn't need to be calibrated when testing stones with sizes over 5pt. Adjust the Level Meter Volume to add lighted columns in LED level meter bars to meet special needs when testing stones with sizes less than 5pt. Important Reminders & Maintenance: Clean your stone before testing - grease and other dirt can give inaccurate test results Hold the probe of the tester upright, when touching the surface of the stones Once the Probe is warmed and the temperature is set or fixed, the Ready Lamp automatically lights up Always slide switch to OFF after use A new battery replacement is needed as soon as red light dims or doesn't light up Keep the probe tip clean and always place the protective cover over the probe when not in use to prevent inaccurate results Packaging: Vinyl Leather Pouch Case Warranty: 2 years warranty (24 months) The Product                   back to top         3) Moissanite Tester with Ultraviolet Light (JEM-III): JEM-III is a sure way to tell the difference between diamonds and moissanite (man made diamonds). This tester will leave you in no doubt as to the nature of your stones. It is a "touch and tell you" device that utilizes the moissanite feature, the different electrical conductivity from diamond. It effectively and quickly distinguishes moissanite from diamond. With the addition of the Ultraviolet (UV) light you can now test the fluorescent reaction of stones. There are some diamonds in the market these days which the diamond selector detects even if the diamond is not the genuine one.  Have the JEM-III moissanite tester and be protected from the diamond simulant like moissanite! Features: Equipped with ultraviolet light to test fluorescent reaction of stones Doesn't need to be calibrated An option to use or connect with A/C adaptor (not included) for long time indoor use Most compact design and low battery consumption Provide visual indicator & emit audible sounds to give warning buzzer if the stone is a moissanite Audible and visual indicator if the probe touches metal surface Powered by a FREE replaceable DC 9V battery With a single press of a button it can accurately and precisely: Quickly distinguishes authentic diamond from Moissanite and; Distinguish stones as small as 2pt Supplied with vinyl pouch, testing platform for loose stones and a comprehensive instruction manual best utilize JEM-III Brand new and unused Specifications: Working Voltage: DC 9V, 6F22 battery, or AC adaptor (110V-240V, DC 9V, optional & not included) Working Time: about 5 hours for continuous use Suggested Working Temperature: 18°C to 30°C Size: 168mm(L) x 31mm(W) x 21mm(D) Net weight: 55g Accessories included: FREE DC 9V 6F22 battery Vinyl Leather Pouch Case Heavy duty Testing Platform Operating Information : PREPARATION Insert 6F22 9V battery into tester. Move the Slide Switch to MOIS and the Power Lamp will light up in red. When the Ready Lamp will light up in blue its ready for use. TESTING Use gem cloth to do normal cleaning work on stones to be tested. Make sure to use a diamond selector to test all the stones to be tested first, so that the fake stones other than diamond or moissanite could be excluded first. For mounted jewelry, please hold the jewelry with one hand while the other hand is holding the moissanite tester keeping at least one finger touching the Electricity Conductive Panel of the moissanite tester then gently apply the testing probe to the stone to be tested perpendicularly. For loose stone, stone should be placed on loose stone testing platform. Hold the testing platform on one hand while the other hand is holding the moissanite tester keeping at least one finger touching the Electricity Conductive Panel of the moissanite tester then gently apply the testing probe to the stone to be tested perpendicularly. For large size stones, do the testing on the top and bottom or front and back of the stone to be tested to get a more accurate reading. If all LED bars in the Indication Window lights up with continues beeping sound, the stone being tested is a moissanite. The JEM-III will not give a beeping sound if the stone that is being tested is a diamond. And if the probe touches the metal part of object being tested, the LED bars in the Indication Window might light up and continuous beeping sound might also be heard. To test the fluorescent reaction of stones under ultraviolet light, move the Slide Switch to Ultraviolet to light up the ultraviolet LED. Always set the Slide Switch to OFF position after every use. Recommended testing environment temperature is from 18°C to 30°C. Stone temperature should be the same as environment temperature. Environment temperature exceeding to 35°C will cause incorrect testing results. Replace battery immediately as soon as red light dims. AC adaptor (110V-240V, DC 9V) is recommended (not included) for long time indoor operation.   Important Reminders & Maintenance: Clean your stone before testing - grease and other dirt can give inaccurate test results Hold the probe of the tester upright, when touching the surface of the stones Once the Probe is warmed and the temperature is set or fixed, the Ready Lamp automatically lights up Always slide switch to OFF after use A new battery replacement is needed as soon as red light dims or doesn't light up Keep the probe tip clean and always place the protective cover over the probe when not in use to prevent inaccurate results Packaging: Vinyl Leather Pouch Case Warranty: 2 years warranty (24 months)   The Product                   back to top