Gems and Watches Gems Watches
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Error margin

The temperature or position of the movement can affect the accuracy of a clock. The error margin is the difference between two different gears. more

Ultrasonic bath

For cleaning pieces of jewellery made of precious metal. Caution is required for some sensitive coloured gemstones. more

Amber

Fossilised hardened resin, predominantly from the Baltic Sea area. Clear or opaque in mainly honey-yellow shades. more

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