تستر الماس

The Diamond Selector II is a diamond tester for distinguishing diamonds from gems, simulants and
stones.
Can be used with any settings: loose stones, stones set in rings, pendants, earings, bracelets, watches.
Metal alert sound will let you know if the tip has touched the metal setting.
Features:

    Use on any shape: tapered, meleed, round, square, rough, etc.
    Can detect any size: from 0.02 carat and larger (follow settings).
    Dual indicator: by a sound signal as well as a light up level meter display featuring segments in green, yellow and red ranges.
    Metal alert: a tone warns you when the probe tip comes into contact with metal.
    Adjustable: sensitivity can be varied according to the size of the stone and the ambient temperature.
    Totally portable: battery powered for complete independence and reliability.