What does 900 mean on Jewellery?

900, 900PT, or PT 900 all signify that the metal used is 900 parts per 1,000 pure platinum, while 950, 950PT, and PT950 denote 950 parts per 1,000 are pure platinum. 925 – a piece with this stamp is made of sterling silver.

What metal is marked 900?

Platinum and other alloys are also indicated If your taste runs to platinum, the number “900” indicates a 90% platinum content and 10% other metals. Marks such as “850” or “800” indicate similar proportions of platinum to other alloys.

What does 950 mean on jewelry?

To protect American consumers, a high-content platinum alloy will be marked 950Pt, 950, plat or platinum, meaning that it’s at least 95% pure, elemental platinum. It’s also the only platinum alloy that can simply bear the “Platinum” stamp to identify that it’s 95% pure platinum.

Is 900 a silver mark?

900 silver is real silver with a relatively high purity. The number 900 refers to its level of purity, and it means that that your silver item is 90% silver and 10% alloy. This number system is an easy way to tell an item’s purity. Another example is 800 silver which is equal to 80% silver.

What kind of clasp does a pot metal brooch have?

The clasp or catch shown here is from a 1930s pot metal brooch. Earlier variations had a lever that closed the clasp, while this style has a rollover closure. This is one of the most common types of clasps used on costume jewelry from the late 1920s onward, and it is still in use today.

What kind of designs are on old brooches?

They range from simple rectangles or ovals to very ornate in design with flowing Art Nouveau motifs. This type of simple “C” clasp or catch can be found on brooches dating primarily to the 1890s although some carryover designs in the early 1900s incorporate this finding as well.

When did they start using clasps on brooches?

Most are seen on French pieces or jewelry made elsewhere, like in Czechoslovakia, and imported into France. They were widely used on pieces made through the 1940s, and more sporadically after that time. Even some brooches made in the 1960s, ’70s, and ’80s, including a number by Chanel, used this type of clasp.

What kind of silver is on the 925 stamp?

925 – a piece with this stamp is made of sterling silver. Legally, to be considered sterling silver a piece has to consist of 92.5% pure silver, with only 7.5% other elements mixed in. GP – pieces with this stamp have been plated with gold, but have another metal underneath.