NATIVE PLATINUM

  • Chemistry: Pt, Elemental Platinum
  • Class: Elements
  • Group: Platinum
  • Uses: Important ore of platinum and other rare metals. Platinum metal is used for jewelry, chemical and other industrial uses as well as a currency stabilizer.
  • For natural mineral specimens, see Platinum Specimens
    For Platinum Jewelry, see --> PLATINUM JEWELRY

    Native platinum is an exotic mineral specimen and an expensive metal. Unfortunately, well formed crystals of platinum are very rare and the common habit of platinum is nuggets and grains. Pure platinum is unknown of in nature as it usually is alloyed with other metals such as iron, copper, gold, nickel, iridium, palladium, rhodium, ruthenium and osmium. The presence of these other metals tends to lower the density of platinum from a pure metal specific gravity of 21.5 to as low as 14 and very rarely any higher than 19 in natural specimens. Few of these rarer metals form significant deposits on their own and thus platinum becomes the primary ore of many of these metals. The presence of iron can lead to a slight magnetism in platinum nuggets and is a common enough property to be considered diagnostic.

    The element platinum is extremely scarce in most crustal rocks, barely seen as even a trace element in chemical analysis of these rocks. However platinum seems to be much more concentrated in the mantle and can be enriched through magmatic segregation. Platinum's origin in the crust is from ultra-mafic igneous rocks and therefore platinum is associated with minerals common to these rocks such as chromite and olivine. Platinum's most common source however is from placer deposits.

    Over the ages, the platinum became weathered out of the igneous rocks and were tumbled down streams and rivers where the extremely heavy grains and nuggets of platinum collect behind rocks and bends in the rivers and streams. These deposits, called placers, that form behind the rocks and bends are enriched in heavy grains as lighter material is carried further down stream. The heaviest grains are the nuggets of gold, platinum and/or other heavy minerals.

    The metal platinum is a valuable metal that is gaining in importance. It is typically more expensive by weight than gold, mostly a product of its scarcity. Platinum is very non-reactive and for this reason it is used in chemical reactions as a catalyst. Metallic platinum can facilitate many chemical reactions without becoming altered in the process. It is also used in many anti-pollution devices, most notable is the catalytic converter, and has been given the nick name the "Environmental Metal". Native platinum is the primary ore of platinum, but deposits containing the rare platinum arsenide, sperrylite of the Pyrite Group, have made a huge contribution to the world's limited supply.

    PHYSICAL CHARACTERISTICS:

    • Color is a white-gray to silver-gray, usually lighter than the platinum color of pure processed platinum.
    • Luster is metallic.
    • Transparency is opaque.
    • Crystal System: Isometric; 4/m bar 3 2/m
    • Crystal Habits include nuggets, grains or flakes, rarely showing cubic forms.
    • Cleavage is absent.
    • Fracture is jagged.
    • Hardness is 4 - 4.5
    • Specific Gravity is 14 - 19+, pure platinum is 21.5 (extremely heavy even for metallic minerals).
    • Streak is steel-gray.
    • Other Characteristics: Does not tarnish, is sometimes weakly magnetic and is ductile, malleable and sectile, meaning it can be pounded into other shapes, stretched into a wire and cut into slices.
    • Associated Minerals include chromite, olivine, enstatite, pyroxene, magnetite and occasionally gold.
    • Notable Occurrences includes Transvaal, South Africa; Ural Mountains, Russia; Columbia and Alaska, USA.
    • Best Field Indicators are color, density, weak magnetism, hardness, associations and ductility.

    Platinum Jewelry - Hover over an item for more information
    Platinum Necklace - Love Letters 'S' Pendant
    You choose the letter below and the meaning behind it. Artisans handcraft the precious metal of your choice in a single flowing line. The chain threads directly through the letter.Only $610.00 at Gemvara
    no photoPlatinum Necklace - Love Letters 'S' Pendant
    $610.00
    Gemvara
    Sphere White Cultured Pearl Platinum Necklace with Ruby - Europa Pendant
    Opposites attract in this timeless pendant design: the soft luster of the pearl perfectly complements the brilliance of the gem.Only $535.00 at Gemvara
    no photoSphere White Cultured Pearl Platinum Necklace with Ruby - Europa Pendant
    $535.00
    Gemvara
    Round Smoky Quartz Platinum Engagement Ring with Amethyst - Trios Ring
    A classic favorite, the graceful and sleek movement of this three-stone ring uplifts a round brilliant gem center supported by smaller pear-shaped stones. While the design embodies a past-present-future message, it is the now you will enjoy most in...Only $810.00 at Gemvara
    no photoRound Smoky Quartz Platinum Engagement Ring with Amethyst - Trios Ring
    $810.00
    Gemvara
    Round Green Tourmaline Platinum Promise Ring - Timeless Knot Ring
    An elegant ring with a 5mm center stone, this knot is carefully handcrafted in your choice of gems and metals.Only $905.00 at Gemvara
    no photoRound Green Tourmaline Platinum Promise Ring - Timeless Knot Ring
    $905.00
    Gemvara
    New York Yankees Heart Bracelet
    A fashionable platinum-plated bracelet featuring the legendary Yankees logo and genuine Swarovski crystals.Measures 7-1/2" in length.Only $79.00 at Danbury Mint
    no photoNew York Yankees Heart Bracelet
    $79.00
    Danbury Mint
    Round Black Onyx Platinum Engagement Ring with Pink Tourmaline - Trios Ring
    A classic favorite, the graceful and sleek movement of this three-stone ring uplifts a round brilliant gem center supported by smaller pear-shaped stones. While the design embodies a past-present-future message, it is the now you will enjoy most in...Only $960.00 at Gemvara
    no photoRound Black Onyx Platinum Engagement Ring with Pink Tourmaline - Trios Ring
    $960.00
    Gemvara
    Hoop Earrings in Platinum (9/16"), One Size
    Each hoop earring is made of high-polished platinum and has a latch backing for pierced ears.Only $325.00 at Blue Nile
    no photoHoop Earrings in Platinum (9/16"), One Size
    $325.00
    Blue Nile
    Round Iolite Platinum Engagement Ring with Amethyst - Trios Ring
    A classic favorite, the graceful and sleek movement of this three-stone ring uplifts a round brilliant gem center supported by smaller pear-shaped stones. While the design embodies a past-present-future message, it is the now you will enjoy most in...Only $905.00 at Gemvara
    no photoRound Iolite Platinum Engagement Ring with Amethyst - Trios Ring
    $905.00
    Gemvara
    Platinum Ring with Ruby & Peridot - Fizzy Stack Ring
    Sparkling gemstones and bubbly discs punctuate this irresistible stackable ring that you'll want to wear with all of the other rings you own.Only $945.00 at Gemvara
    no photoPlatinum Ring with Ruby & Peridot - Fizzy Stack Ring
    $945.00
    Gemvara
    Platinum Anniversary Ring with Aquamarine - Simplicity Princess Matching Band
    This band perfectly complements the Simplicity Princess Ring.Only $925.00 at Gemvara
    no photoPlatinum Anniversary Ring with Aquamarine - Simplicity Princess Matching Band
    $925.00
    Gemvara
    Platinum Ring - Bridle Ring
    Elegantly simple. One strong link forms a graceful beautiful ring in this design.Only $965.00 at Gemvara
    no photoPlatinum Ring - Bridle Ring
    $965.00
    Gemvara
    Round Green Tourmaline Platinum Earrings with Rhodolite Garnet & Rock Crystal - Halo Earrings
    Classic yet dazzling, a halo of gemstone surrounds the center gems in a blaze of brilliance. These earrings are so perfectly simple you'll never take them off.Only $950.00 at Gemvara
    no photoRound Green Tourmaline Platinum Earrings with Rhodolite Garnet & Rock Crystal - Halo Earrings
    $950.00
    Gemvara
    Round Blue Topaz Platinum Promise Ring - Cynthia Ring
    Pure perfection. Elegant tapering lines and a arched profile distinguish this sophisticated take on the classic solitaire. The setting tapers so that the ring can be worn with a band if desired.Only $980.00 at Gemvara
    no photoRound Blue Topaz Platinum Promise Ring - Cynthia Ring
    $980.00
    Gemvara
    Emerald-Cut Amethyst Platinum Ring - Loop de Loop Ring
    This piece is a fresh take on a classic style. Partial bezel-set with emerald cut gem, the center setting is balanced between two looped ends of the band, recessed like the tear-shaped eye of a sewing needle. Contrasting right angles and curves add...Only $760.00 at Gemvara
    no photoEmerald-Cut Amethyst Platinum Ring - Loop de Loop Ring
    $760.00
    Gemvara
    Round Red Garnet Platinum Engagement Ring with Blue Topaz - Trios Ring
    A classic favorite, the graceful and sleek movement of this three-stone ring uplifts a round brilliant gem center supported by smaller pear-shaped stones. While the design embodies a past-present-future message, it is the now you will enjoy most in...Only $770.00 at Gemvara
    no photoRound Red Garnet Platinum Engagement Ring with Blue Topaz - Trios Ring
    $770.00
    Gemvara

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