"20 microns" is a size measurement that has very little indeed to do with evaluating a piece of jewelry. More applicable would be someting like karat markings or carat weight.
2c microns on jewelry refers to the thickness of the gold plating on the piece. In this case, the gold plating is 2 microns thick, indicating a higher quality and longer-lasting finish compared to thinner plating.
It is an item, usually valuable, that is passed through a family. Like a piece of jewelry.
Heavy Gold Electroplate which means it is 5 microns thick gold plating.
In the context of jewelry, the number 946 is likely a hallmark that indicates the purity of the metal used in the piece. It is most commonly associated with platinum jewelry, indicating that the piece is 94.6% pure platinum. This high level of purity makes the jewelry valuable and durable. It is important to look for such hallmarks when purchasing jewelry to ensure its quality and authenticity.
The SC with an anchor symbol on jewelry stands for "Sterling Craft," which indicates the piece is made of sterling silver. Sterling silver has a high purity level of at least 92.5% silver, making it a valuable and durable material for jewelry.
A jewelry box marked with "Vanderbilt Jewel" may refer to a piece of jewelry owned by the wealthy Vanderbilt family or inspired by their style. The Vanderbilt family was known for their extravagant tastes and collection of exquisite jewels, so the box could have held a valuable or historically significant piece.
The number 84 stamped on jewelry typically indicates that the piece is made of 84% pure gold, which translates to 21 karats. This marking is commonly found on jewelry from countries like Russia, where 21 karat gold is a standard purity level. It signifies high-quality gold content, ensuring that the piece is valuable and durable.
The number 650 on a piece of gold jewelry indicates the purity of the gold, specifically that it contains 65% gold and 35% other metals. This is equivalent to 15 karats, as pure gold is 24 karats. The remaining metals are often added to enhance durability and alter the color of the jewelry. It's important to note that the higher the karat, the purer the gold and typically, the more valuable the piece.
the number usually helps jewelry makers keep track of each piece of jewelry she/he makes
14kt soild gold
do not touch
That depends on what you mean. If a piece of silver jewelry is say marked with the word Norway as opposed to one marked Italy, I would opt for the Norway piece. It's probably going to be a lot more valuable, in most cases that is.