group metals (PGM), comprise six closely related metals:
Platinum, Palladium, Rhodium, Ruthenium, Iridium and Osmium.
Platinum ( simbol Pl) was excepted as a precious metall
only after second half of 19th century and has a deep
luster and a rich, white color. It is rarer and heavier
than all precious metals and considered to be more valuable
Platinum is often used to set the most valuable gems to
produce the finest jewelry. Platinum holds gemstones most
securely, because its strength and neutral color enhances
the brilliance and depth of diamonds and precious stones.
Because of its density and weight, you can feel the difference
between platinum and other precious metals. There are
no karat marks to identify platinum. In the United States
platinum is usually marked:
PT or PLAT.
In Europe, platinum is identified by the following marks:
950 or PT950.
Since platinum is the purest metal it rarely causes an
allergic reaction. There is an increased interest in platinum
jewelry both in
the US and abroad.