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Designed to transmit only deep red and yellow-green light (best obtained under strong electric light). Just hold the filter close to your eye and look at the stones. Multiple stones can be viewed at once. It is helpful with identifying a few red gems and certain blue and green stones. Can filter out mixed-in jewelry and differentiate emerald from emerald look alike. It is also useful for checking aquamarine and sapphires.
It has a glass filter. This gives better clarity, reduces distortion and provides better protection from humidity. It is also a combination of two gelatin filters that transmit only deep red and yellow/green light. As Emeralds transmit light in the deep red spectrum but absorb light in the yellow/green spectrum, this combination is the most practical. It is a useful tool to distinguish natural emerald and natural green beryl, as well as most green and blue gems.
Features :
- Equipped with a Glass Filter which gives better clarity
- Reduces distortion and provides better protection from humidity
- Heavy Duty and very reliable and transportable
- Doesn't need to hold it closer to the stone, even items in showcases can be examined providing they are lit by strong lights
- Accurately distinguish the real nature of the gems in an instant
- Approved by strict quality and safety standards for long and trouble-free life
- Guaranteed high-quality and accurate testing results
Specifications
- Filter Diameter : 20mm
- Body: Made of metal
Set includes :
- 1 x Jadeite Filter
- 1 x Synthetic Leather Carry Case
- Standard Packaging Box
Joseph C. Dederen
Reviewed in the Netherlands on January 15, 2025
Ik kocht de Chelsea filter na het lezen van een artikel in het tijdschrift van de mineralogische kring Antwerpen. Leuk om groene mineralen te testen op de aanwezigheid van chroom(III).
eloiner
Reviewed in France on August 14, 2024
Un peu perplexe suite à la lecture des avis. Mais je vous garantis que ce filtre est parfait et qu’il rempli très bien ses fonctions. La tourmaline chrome vire au rouge très visiblement. L’étui est sympa. Bref bon produit à un très bon prix.
Michael Matus
Reviewed in Germany on June 22, 2024
Unter den Namen “Chelsea”-Filter wäre es leichter zu finden.
Dennis McGillivray
Reviewed in the United Kingdom on August 3, 2020
Easy to use, well made tool. Another tool in the gemologist tool box.
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