Name: platinum
Symbol: Pt
Atomic number: 78
Atomic weight: 195.078
Group name: Precious metal or platinum group metal
Melting point: 1768.3 °C (3214.9 °F)
Boiling point: 3825 °C (6917 °F)

"Platinum is the hardest of the precious metals, it never tarnishes. Its intense luster remains intact over the years, and it is completely hypoallergenic.

It is extremely dense, and remarkably heavy. Much more so than silver or gold. This property of platinum enhances and ennobles the quality of the jewelry from which it is created." Source

Silvery white metallic transition element. Used in jewellery, laboratory apparatus, electrical contacts and in some alloys. Also a hydrogenation catalyst. Does not oxidize or dissolve in hydrochloric acid. Source

1. Symbol Pt A silver-white metallic element occurring worldwide, usually mixed with other metals such as iridium, osmium, or nickel. It is ductile and malleable, does not oxidize in air, and is used as a catalyst and in electrical components, jewelry, dentistry, and electroplating. Atomic number 78; atomic weight 195.08; melting point 1,772°C; boiling point 3,827°C; specific gravity 21.45; valence 2, 3, 4.
2. A medium to light gray.

[New Latin, from Spanish platina, platinum. See platina.]

Platinum metals (Chem.),

the group of metallic elements which in their chemical and physical properties resemble platinum. These consist of the light platinum group, viz., rhodium, ruthenium, and palladium, whose specific gravities are about 12; and the heavy platinum group, viz., osmium, iridium, and platinum, whose specific gravities are over 21.

platinum blond n.

1. A very light silver-blond hair color, especially when artificially produced.
2. A person having hair of this color.

Platinum Info and Properties
Platinum Element
The Eighth Metal: The Rise of the Platinotype Process (in photography)

The Going Blonde Home Page
Platinum Blond Barbie

JM on dying his hair.