Platinum become synonymous with luxury and longevity as it considered among the most pure and precious metal used in modern-day jewellery making. Platinum often mixed with other metals to make it more malleable for its hardness and durability. The most common alloy metal paired with platinum are copper, palladium, rhodium, iridium, and titanium. Platinum boasts a silvery-white luster that imparts elegance and blends well with a variety of metals and stones. It’s at least thirty times rarer than gold, four times stronger than gold, resistance to damage and wear, and its substantial heft.  Only metals marked with a 950 or 900 purity designation are considered high-grade platinum.

Hallmarks of Platinum

To indicating its purity of jewellery piece, pure platinum is often marked simply with the letters ‘PLT’, ‘PLAT’, or ‘PLATINUM’, which indicated that the piece consists of at least 95% platinum. If other alloys are added, such as copper or palladium, the hallmark will indicate the number of parts-per-thousand, such as ‘900PLAT’ (900 parts of platinum out of 100).

Although, it is not government-mandated law in all countries to stamp a piece of jewellery with its hallmark, nevertheless its means of ensuring a confident informed jewellery shopping experience.