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Overview
Platinum is very different to work with than other precious metals, which is why platinum needs its own working tools. For this reason, platinum jewellery takes longer to produce and is more expensive than jewellery made from other precious metals.
High-quality platinum alloys are hypoallergenic, so allergic reactions to platinum jewellery very rare.
Platinum is durable, and this is why jewellery made out of platinum is durable, even when the jewellery is delicate.
Hallmark
In Finland, platinum jewellery is hallmarked according to its fineness, expressed in parts per thousand (‰). For example, a 950 hallmark indicates that the alloy contains 950‰ (95%) pure platinum.
Cleaning
Clean jewellery with lukewarm water and use mild dish soap (which has a neutral pH). You can use a new, clean toothbrush.
After washing jewellery, dry it carefully with a clean, lint-free cloth. If you use anti-tarnish cloth, make sure it is suitable for platinum jewellery.
Platinum doesn't tarnish. Take jewellery off when working, especially with chemicals.
Storage
Store jewellery separately from other pieces to help prevent scratches.
Keep the jewellery in its original box or another clean jewellery box. Alternatively, wrap it in a clean, lint-free cloth and place it in an airtight bag.
It is recommended to remove platinum jewellery before handling chemicals or cleaning products.
Prosessing
Recycling
Platinum can be recycled, although not all goldsmiths have the facilities to accept platinum jewellery and recycle the metal from older pieces.
Stone Setting
Platinum is an excellent choice for gemstone settings. It is soft but tough, allowing the metal to be shaped securely around a gemstone.
Element: Pt
Melting point: 1,772 °C
Density: 21.5 g/cm³
Colour: Greyish white