Chelsea Filter
This filter is 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 certain red, blue and green stones.
Chelsea filters are primarily used for spotting fakes added to colored stone parcels and mixed in jewelry, and to differentiate emerald from emerald look-alikes, it is also useful for checking aquamarine and sapphires.
With the filter emeralds usually appear distinctly red or pinkish in color, while most imitations remain green.
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.
If you want to know more products, please visit our website www (dot) .
Send product request
Other supplier products
 |
Wine/Oe Refractometer RHW-25BrixATC | Grape & Alcohol Refractometer is mainly designed to test the sugar content in original grape juice and alcohol-content by volume of the grape wine ... |
 |
Salinity refractometer RHS-10ATC | Salinity Refractometer is designed for testing the concentration of salt water and brine and used for quality control in research and clinical labo... |
 |
Ruby Filter | Rubies (both genuine and synthetic) appear brilliant red under the filter. Synthetic blue spinel appear yellow-orange or pink while aquamarine and ... |
 |
Ultrasonic Cleaner CD-7810A | This Model can cleans discs such as CDs, VCDs, DVDs, etc. Use only plain tap water to clean, Remove dirts is effectively; The results can be seen w... |
 |
Antifreeze/Battery Refractometer RHA-503ATC | RHA-503ATC models are equipped with °C unit system. With the indication of the percentage we may know the freezing point of either ethylene gly... |
Same products
 |
Custom Stainless Components for OEM Applications | Seller: Yongjia County Yaokang Technology Co., Ltd. | Our stainless steel float balls are designed for float valves, water tanks, and industrial liquid... |
 |
Precision Design for Automatic Liquid Level Control | Seller: Yongjia County Yaokang Technology Co., Ltd. | Our stainless steel float balls are designed for liquid level control applications in valves, tan... |
 |
"China manufacturer power supply VM-5H3 for power generation | Seller: DONGFANG YOYIK (DEYANG) ENGNIEERING CO; LTD | "China manufacturer power supply VM-5H3 for power generation Is to use the generator sets of prof... |
 |
Reliable Components for Water and Industrial Systems | Seller: Yongjia County Yaokang Technology Co., Ltd. | The Stainless Steel Float Ball is designed for automatic liquid level control and fluid managem... |
 |
Double Convex Lenses | Seller: Shandong Yanggu Constant Crystal Optics, Inc | Double Convex Lensesare used in image relay applications, or for imaging objects at close conjuga... |
