The most common jewellery allergy is to nickel, a natural white metal that is often mixed with other metals to create an alloy. Almost 15% of the population is allergic to nickel.
As the nickel alloy sits against the skin, the natural sweat and oils from the skin oxidize the metal. As a result of the oxidation, a thin layer of nickel salts form on the jewellery. Those salts then penetrate the skin causing itchy, painful reactions.
Pewter was used in the ancient world by the Egyptians and later by the Romans, and came into extensive use in Europe from the Middle Ages.
Our pre-Columbian jewellery
The base metal for the castings and gold pieces are made of Pewter, a metal alloy, which means it's a mixture of two or more metals.
Tin is the major component of pewter at more than 90% and the rest is made up of antimony and copper.
Tin is a soft metal and would easily deform even at normal temperatures, which makes it difficult to work with.
Therefore, antimony and copper are added to the tin in order to make it harder and to increase the melting temperature to 250°C (482°F).
Tin is classified as a precious metal and it has quite a noble history.