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At the top and bottom of the tube are two filters (Polaroid discs)
revolve the top filter until everything in the tube appears dark and place the stone on the platform in the middle
This weighing machine is not approved for use in trade
The first gem tester that is truly pocket-size
This really is the largest possible strongest possible loupe with the highest quality triplet lens (even allowing for the "useable" area of the lens)
HARDNESS PENCILS X8 (MOE 2 TO 9) + PLATES X3 Magnification_10X At the top and bottomSummary Set of ten hardness testers. 8 hardness picks ("pencils") from No. 2 to No. 9. 1 Glass plate (hardness 5. 5) 1 Brass plate (hardness 3. 5) Also 1 streak plate (to test a mineral's streak colour) 1 magnet 1 polishing stone to keep the tips sharp Each 'pencil' has a tip of a different hardness from No. 5 to No. 9 on the Moe scale of hardness (see 'Further Information'). Is it easy to use? Yes. See which will scratch your sample and which will