Chelsea Filter for testing Gemstone Gems,Testing, Loupe. GIA TOOLS - Black Color

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. Chelsea Filter Gemstone/4 Gems, Testing, Loupe a.imagelink {color:#5e5c57;} a:hover.imagelink {color:#5e5c57;} a:visited.imagelink {color:#eee6d6;} a.imagelink img.auctionimage { border: 2px solid #5e5c57; } a:visited.imagelink img.auctionimage { border: 2px solid #eee6d6; } Color: Black The renowned CHELSEA FILTER is a must have for identifying colored stones. While it was originally intended to rapidly differentiate between genuine Emeralds and the pastes and doublets which resemble them, it also is a valuable aid in identifying other colored stones, as well. Designed to transmit only deep red and yellow-green light, and the best results are obtained when stones are examined under a strong electric light. Just hold the filter close to the eye with the stone or stones (for a number of stones can be examined at one time) receiving as much light as possible. Under these conditions, Emeralds (absorbing in the yellow green) usually appear distinctly red or pinkish in color, the actual tint varying from merely pinkish in the case of pale stones, to a rich almost ruby red for better colored specimens. On the other hand, most imitations of the genuine stone (pastes, doublets, soude Emeralds) retain a green appearance. A helpful tool in identifying certain red, blue and green stones. In rare cases, certain Emeralds, notably those from South Africa, may not show any pinkish reactions. Generally, green synthetic Spinels display green under the filter, though some stones, probably colored by chromium, show red. Synthetic Emeralds react in the same way as genuine stones, though the resident red color is often more brilliant. A reliable indication of Ruby (both natural and synthetic) is given by a characteristic brilliant red seen through the filter, synthetic Rubies being on the whole more brilliant than the genuine. Synthetic blue Spinels, which are intended to imitate Aquamarine and Sapphire, appear yellowish-orange or pink when examined, while the stones they are intended to represent appear green or greenish gray. Cobalt-glass imitations of Sapphire show a deep red, though some other blue glass imitations; colored by iron, do not display any real reaction. Green pastes show green. SPECIFICATION: Lens Diameter: 20mmHousing Diameter 25mmWarranty: 2 years warranty (24 months)WARNING: Do not confuse with JADEITE Filter, which is primarily designed to distinguish other semi-precious green or greenish looking stones, such as Jade. We have 2 colors available, White or Black.. Please leave a message at checkout for your color preference, otherwise we will send black color as default. P.S. black has a slightly larger optical lens than white. Payments are accepted through Pay pal. We ship through USPS First Class 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 3-6 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 a 20% discount on the shipping cost. 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 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.

This refractometer is for measuring the sugar content of beer and includes an automatic temperature compensation of 10 - 30 degree Celsius. This refractometer can replace your hydrometer for easier and more accurate measurements. Simply use the dropper to take a sample of wort and put it on the prism. Then hold the refractometer up to the light and look through the eyepiece. Due to the dual scale there is no need convert to specific gravity as the scale measures both Brix and SG. We have earned Top-Rated status, we stand behind our products, hundreds of refractometer sold. Please see our feedback and buy with confidence. Each refractometer comes with 2 years warranty against defects. We will simply send you a brand new one if needed. * 0-32% Brix Scale / 1.000-1.120Â Wort Specific Gravity * Accurate to +/- 0.20% Brix / +/- 0.001 Wort Specific Gravity* Scale Divisions: 0.20% / 0.001 Wort Specific Gravity* Automatic Temperature Compensation (ATC)* Sturdy design