Model : Set D
(1) New Calcite Dichroscope (CLMG-7208):
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
- Synthetic Leather Soft Case
- User Manual
(2) Small Diffraction Spectroscope (CLMG-7206):
A handheld spectroscope for visible light shows the absorption lines of the elements involved in producing its color. For instance, it helps to separate ruby (chrome) against red or pink sapphire (iron). Spectroscope breaks up the light that is being transmitted from a gemstone to its spectral colors. The process allows the gemologist to see the various wavelengths absorbed by the gemstone. Thereby allowing the gemologist to know what elements are contained in the gemstone that are causing the absorption. Making this as one of the most important tools in identifying gemstones.
Spectroscopes allows you to analyze a loose or mounted stone's spectrum. They help distinguish naturally colored diamonds from those that have been irradiated and help to distinguish natural stones from synthetics by the stone's selective absorption of certain wavelengths.
- Length : 50mm
- Diameter : 14mm
- Materail : Brass (Durable)
- Synthetic Leather Carry Pouch
(3) Chelsea Filter (CLMG-7300):
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
- Synthetic Leather Carry Pouch
(4) Handheld Polariscope with Flashlight (CLMG-7202):
The polariscope is used to test cut or rough gemstones. Allows two polarising filters to observe the structure and optical properties of precious stones or minerals. It visually shows if a stone is doubly or singularly refractive. It can also be used in identifying Moisannite and detecting strain in diamonds.
- Darkfield Loupe
- Size: Lenght: 80mm, Diameter : 28mm
- Gemmologist tool for diagnosing optical properties of a gemstone (singly refractive or double refractive).
- Material: Optics glass, Metal
- Handheld LED flashlight
- Lenght: 156mm
- Diameter: 24mm
- Power: AA battery x 2 , (Batteries are not included)
- Handheld LED Flashlight
- Carry Pouch
- Put the flashlight into the opening under the polariscope.
Tighten the screw to hold the flashlight secure.
- Insert the removable lense into the polariscope with narrow end down.
- Place Gemstone in the prong holder into the open space as shown above.
- Turn on flashlight. Hold the upper portion of the polariscope to your eye.