Experts on precious metals, stones, and watches take a close look at jewelry and watches. They use different grading scales to certify and grade items. When working on jewelry, the chains, clasps, and all other added accents, such as diamonds, pearls, and even gemstones, are taken into consideration.
In certifying jewelry bands, clasps and its other metal components, it is important that the following characteristics are inspected:
- Precious metal content (measured in Troy Weight Standards)
- Luster
- Signs of wear and other visual factors such as oxidation, scratches, etc.
- Design
Meanwhile, in certifying jewels in jewelry, especially diamonds, we use the 4C’s as basis:
- Color
- Clarity
- Cut
- Carat weight
Our watch experts, on the other hand, perform an intensive investigation on the item based on the following:
- Power reserve
- Timing accuracy
- Appearance
- Physical condition (handling evidence, blemishes, dents, marks, etc.)
- General condition (whether it is working perfectly or restored properly)
The hand movements in mechanical watches are tested with a spring-balance oscillator.