GCF-T03 Chelsea Filter with magnification 15X - 21mm
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Descripción del producto
Some gemstones appear to change colour when viewed through the Chelsea Colour Filter. This colour change helps identify many gemstones, distinguishing ruby from paste; distinguishing garnet (though not all garnets) emerald and aquamarine from paste. The Chelsea Filter also distinguishes many manmade stone such as cobalt-blue glass and blue synthetic spinel from natural blue stones. As with all gem testers, care must be taken since nature does not make gemstones to standard formulae and variations exist.
Specification:
● Dimension: 90.6x27mm (L*H)
● Magnification: 15x
● Fully corrected triplet lens dia.: 21mm
● Body Material: Metal
● Package: by leather box & white box
Care of the Chelsea filter:
- Do not touch the filter (use a soft dry cloth to remove dust)
- Do not allow it to become hot, e.g. on a radiator or in direct sunlight
- Do not immerse in liquid
- Keep it folded closed when not in use