The Chelsea filter is a compact gemological tool used to help identify certain red, blue, and green gemstones by observing characteristic color reactions under filtered light. It is especially useful for spotting imitations mixed into colored stone parcels and jewelry, and for differentiating emerald from common emerald look-alikes.
Features
- Assists in identifying select red, blue, and green gemstones
- Commonly used to detect simulants in colored stone parcels
- Helps differentiate emerald from emerald look-alikes
- Useful for checking aquamarine and sapphires
- Compact and easy to use in bench or field settings
Specifications
| Instrument Type |
Color Filter for Gem Testing |
Notes
Use under appropriate lighting conditions for best results. A Chelsea filter is a screening tool and should be used in combination with other gemological instruments for more conclusive identification.
