Gemological Gemstone Gem Refractometer Built-In Light for GIA testing

Description: GEMOLOGICAL GEMSTONE GEM REFRACTOMETER BUILT-IN LIGHT This refractometer requires RI oil. We sell it separately, please CLICK HERE for the RI Oil This item is 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). This product offers you the worry-free, light and easy way to identify and/or authenticate your most precious gemstones. Buy Now! Features:Convenient & easy to carryWith built-in light source that makes it a carry-and-use-it-anywhere deviceComes with Automatic Temperature Compensation (ATC) that let itself adjust to the climateApproved by strict quality and safety standardsUndoubtedly durable and very reliableTwo color available, black and light grey. Black color will be the default color to ship. Specifications:Measuring Range: 1.30 – 1.81 RI Minimum Graduation (RI): 0.01 RI Illumination: Internal illumination with momentary switch(Standard wavelenth 589nm)Size: 30mm x 70mm x 130mm Scale Division: 0.01 nD Weight: 0.4 kg Ranges of Application: Laboratory, Gemology Filter: Polarizing filter Power Source: 1.5V x3 button batteries Made of durable heavy metal and scratch proof glass 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.Accessories included:1.5V x3 buttom batteriesPolarizer Storage Case Refractometer Index Reference List (For more than 200 common gemstones, i.e. Calcite, Jadeite, Quartz etc.) User's Manual Warranty: 2 years We are starting to listing more items, all about optics,all the good deals! please View seller's other items Black Color Available Our goal is to place a profit margin of $1 ~ $3 per item and sell in volume. As such, the more you save the more we make. While the others are selling 1 item, we are selling 10 ~ 20 items due to our price reduction. Payments are accepted through Paypal. We ship through USPS Prority from Oregon, west part of the country should receive in 1-3 days,middle part and east part of the country should receive in 2-4 days! International: We charge the same shipping cost to all our customers worldwide(same shipping cost worldwide). Our default shipping is United State Postal Service First Class mail, it take 5-10 business days for delivery. we also offer faster shipping EMS which take 3-6 days. Handing time: 1 business day. For payment received before 14:00PDT, it will ship in the same day. Terms of Sale: We promise our best quality and the lowest price for our customers, if the item is not as the description in the listing page, we will issue a exchange or full refund. if the item is the same as the description, we willl charge a 15% restocking fee. We are a new seller on Ebay, all our prices are really low compare to others, because we want to earn feedbacks. Please understand our feedback will be left once after we have received feedback from buyer. We do Combined Shipment on any multiple purchases. We are pleased to grant a20% discount on the shipping cost of purchases more than item. Please feel free to contact us for discounted shipping costs when you buy multiple items from us. Please use the "Ask Seller A Question" button. Please allow up to 24 hours for a response. Usually the buyer will get response in 6 hours.Customer Satisfaction • Please contact us right away (via eBay Messages) if you have any concerns, questions or issues about your purchase – and before you leave feedback. • If you give us the chance, we will make every effort to make it right for you! • We strive for five stars from you in feedback – and work hard to earn it. • Customer satisfaction is very important to us and our goal is to have every customer want to be a repeat customer. Track Page Views With Auctiva's FREE Counter

Price: 92.72 USD

Location: Oregon City, Oregon

End Time: 2024-04-11T17:54:25.000Z

Shipping Cost: 0 USD