1) Chelsea (Jadeite) Filter:2) Jeweler's Loupe 10x TRIPLET Magnifier Lens :
An essential device in 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 colour, the actual tint varying from merely pinkish in the case of pale stones, to a rich almost ruby red for better coloured 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, most notably from South Africa, may not show any pinkish color at all. A synthetic emerald will react the same as a genuine one. Rubies (both genuine and synthetic) appear brilliant red under the filter. Synthetic blue spinel appear yellow-orange or pink while aquamarine and sapphires appear green or green-grey.
This Chelsea color filter has a glass filter which gives better clarity, reduces distortion and provide better protection from humidity. With Chelsea filters you can differentiate the genuine emeralds from the fake once, as well as checking the authenticity of aquamarine and sapphires with comfort and ease.
- Filter Diameter: 20mm
- Body: Made of metal
Warranty: 2 years warranty (24 months)
Made with precision, HEAVY DUTY, HIGH QUALITY and one of the most important tools used to inspect gemstones and other jewelry. With its special OPTICAL GLASS with 10x powerful magnification lenses, objects appear to be larger and reveal tiny details that couldn't seen with normal vision even the very smallest detail into sharp focus such as tiny crystals, trace minerals, grain surfaces, and microfossils. It comes with a Cushioned Sturdy storage case for protection and ease of carrying anywhere.
Usage & Applications:
It can be used in a number of different industries, notably in jewelry trade, photography, printing, laboratories, etc. Used for many soldering applications to inspect a printed circuit board with small surface components on it, to carefully analyze how ink lays on paper while register film separations to one another, to check registration of colors, estimate dot-gain, and diagnose issues with roller pressure and chemistry based on the shape of individual dots and rosettes, and to review, edit or analyze negatives and slides on a light table, for viewing the ground glass image to aid focussing, for a real close-up inspection of Gems, Diamonds and Minerals, circuit board films, reading fine prints, stamps, jewelry and coins, photos, aid to collectors, scientists, hobbyists, and antiques or any other small intricate items.
- Uses OPTICAL GLASS
- With 10x magnification
- Size: Diameter 21mm and 18mm available
- Useful tool for a variety of gemstones
- Reliable and transportable
- Durable & built to last long, indeed a value for your money device
- Complete with FREE sturdy carrying case with cushioned compartments that fits the device perfectly, an added protection for the device.
- Sturdy leather carrying case with cushioned compartments
Warranty: 2 years warranty
Dichroscope show whether or not a stone is dichroic (reflects 2 colors). This can be helpful in differentiating stones of the same color from one another. Dichroscopes can be useful with identifying gemstones that are still in the rough and when stones are set and difficult to get to with other instruments. Light entering the dichroscope is broken into two polarized rays that have vibrational directions at right angles to each other. The two images in the dichroscope represent the polarized light and the pleochroic colors signifies doubly refractive stones except if the stone is viewed thru the optic axis. Single color in the dichroscope represents singly refractive stones.
The advantage of the dichroscope is that the two pleochroic colors that may be characteristic of a given direction in a doubly-refractive gem are seen side by side. If no dichroism is identified in the first assessment, the stone can be turned and viewed in other directions. Trichroic gems can also be distinguish and will reveal three colors if the stone is viewed in three directions perpendicular to each other.
- Type : calcite
- Diameter : 15mm
- Length : 60mm
- Body : Metal
Operating Information :
- Eye viewer: Hold the upper portion of the dichroscope to your eye.
- Gem View: Hand hold and place the gemstone flush to the opening. The hexagonal shape at the end makes it easier to turn the dichroscope during identification.
- Gem Prong: Gem Place Gemstone in the prong holder into the open space as shown above. Preparation Complete Identify Pleochroism. With gemstone visible through the Gem View opening slowly turn the dichroscope exactly 1 fullrotation. Pay close attention to any color differentiation between the two small squares visible inside the dichroscope during the rotation. That number of different colors determines the refractivity and pleochroic properties of the stone. Repeat the rotation a few times to double check the count. If you do not see color changes be sure to turn the gemstone to several other angles and repeat the process above. Sometimes the pleochroism only shows on a particular axis of the gem.
Every Dichroscope come with a Leather Soft Case and 2 years warranty!
Posted by Unknown on 31st May 2013
I like this kit a lot, it has great stuff including a wonderful Chelsea filter. I use everything in this kit so much, it has paid for itself. Great shipping and speedy delivery made this a five star purchase!