Portable Handheld Polariscope with Desktop and similar items

Holiday Return/Exchange Policy: For customers who purchase between now to December 25th, we will automatically extend the return/exchange date to January 31st. No restocking fee, no question ask, hassle free return. Portable Handheld Polariscope with Desktop Led Light polariscope The polariscope is use to test cut or rough gemstones. Allows two polarising filters to observe the structure and optical properties of precious stones or minerals. It can also be used in identifying Moissanite and detecting strain in diamonds. Equally important and just a little more expensive. It can be used with a thing called a strainless sphere, (that is a glass sphere with no strain lines in it,) or a loupe. It visually shows if a stone is doubly or singularly refractive and its optic sign. It will also show strain and twinning, which will occasionally help to distinguish between natural and man made materials. Features: HEAVY DUTY and precise because it made with metal and optical glass Durable, reliable and made by professional craftsmen Gemmologist tool for diagnosing optical properties of a gemstone (singly refractive or double refractive)during usage Specifications: Size: Length : 80mm Diameter : 28mm Material: Optics glass, Metal Gemmologist tool for diagnosis optical properties of your gemstone(singly refractive or double refractive) DESKTOP HANDFREE LED LIGHT SOURCE(Not a simply flashlight) Pocket Polariscope Instructions 1 Flashlight Put the flashlight into the opening under the polariscope and tighten the screw to hold the flashlight secure. 2 Assemble Insert this removable lense into the polariscope with narrow end down. Turn on flashlight. 3 Place Stone Gently place stone on removable lense. Some people prefer to use tweezers to hold the stone between the two filters. We find this requires 3 hands, and simply rest the stone on the removable lense. 4 Rotating Lense Look through the upper lense of the polariscope. Rotate removable lense exactly 1 full rotation. Count the number of times the stone blinks (or goes from light to dark.) That count is the refractivity of the gemstone. Determining Refraction While looking through the top lense, and rotating the stone if the stone: -stays dark throughout a 360 rotation= isotropic (single refractive). -blinks 4 times,2 light and 2 dark during a 360 rotation = anisotropic (double refractive). -stays light throughout a 360 rotation =microcrystalline or cryptocrystalline aggregate -twinkles instead of blinks = anomalous double refraction (ADR) and is really isotropic ADR is when a stone looks like it might be blinking, but really is just showing lighter where the stone is thinner or where there is a veil or weakness in the stone. Garnet and diamond sometimes display this phenomena. Isotropic Opal Amber Glass Plastic Diamond Spinel Garnet Anisotropic Zircon Quartz Beryl Apatite Corundum Tourmaline Topaz Zoisite (Tanzanite) Peridot Orthoclase Spodumene Labradorite Axenite Mossenite (Syn. Diamond) Desktop LED light for Polariscope / Darkfield Loupe etc Warranty: 2 years warranty We also have Conoscope available for use with polariscope, please click the link below Conoscope Interference Sphere Ball for Polariscope gem Payments are accepted through Paypal. We ship through USPS Priority Mail 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. 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. We promise our best quality and the lowest price for our customers, if the item is not as the same 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 will charge a 15% restocking fee. We are a new seller , 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. 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. 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.