Carat has two distinct meanings
Carat can refer to the quality or purity of gold –
pure gold ie a metal that is 100% gold and nothing else but gold, is known as pure gold or 24 carat gold
So for example with this ring – which is 18 carat ie 18/24s gold or put another way, 18 divided by 24 is 0.750 or 3/4
You may see jewellery marked 0.750 which is a some what modern way of writing 18ct as we say in the UK and 18k as they say in the rest of the world
Secondly carat can refer to the weight of precious stones such as diamonds and sapphires
One carat is 1/5 of a gram – so 1/2 of a carat is 1/10 of a gram
Platinum first started to be used in antique jewellery in about 1900. It was initially introduced by the great jewellers like Cartier. One of its attractions is that it is a strong metal and so the vintage jewellery can be made very fine, for example platinum claws can be much thinner that gold ones.
In 1973 platinum was first covered by the hallmarking act, A standard of 950 parts per thousand was introduced.
The platinum mark is an orb with a cross on the top all set within a pentagon.
First pieces were marked in January 1975 at the London assay office
Jewellery Periods antique and vintage
Victorian Victoria 1837 – 1901
Edwardian Edward V11 1901 – 1910
Belle Epoque Garland Art Nouveau Art Deco
please contact Paula for more details and to discuss price