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AUSTRALIAN TOURMALINE CRYSTAL

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AUSTRALIAN TOURMALINE CRYSTAL

A very large, terminated Australian Tourmaline Crystal!  Beautiful and rare, this is old stock and not likely to be found again.  We were very lucky to come across such a beautiful piece.  It is really one large crystal with several other crystals clustered around the base, all well terminated.  A superb specimen for the Aussie Minerals collector.

Location:
Mt Isa, Queensland.

Dimensions:
8cm x 8cm x 6cm, 856g.

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AUSTRALIAN TOURMALINE CRYSTALAUSTRALIAN TOURMALINE CRYSTAL

A very large, terminated Australian Tourmaline Crystal!  Beautiful and rare, this is old stock and not likely to be found again.  We were very lucky to come across such a beautiful piece.  It is really one large crystal with several other crystals clustered around the base, all well terminated.  A superb specimen for the Aussie Minerals collector.

Location:
Mt Isa, Queensland.

Dimensions:
8cm x 8cm x 6cm, 856g.

Tourmaline (variety Dravite): Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
There are many unique properties of tourmalines. First, they are piezoelectric which means that when a crystal is heated or compressed (or vibrated) a different electrical charge will form at opposite ends of the crystal (an electrical potential). Conversely if an electrical potential is applied to the crystal, it will vibrate. Secondly they are pleochroic which means that the crystal will look darker in color when viewed down the long axis of the crystal than when viewed from the side. This property goes beyond the idea that the crystal is just thicker in that direction. Even equally dimensioned crystals will demonstrate this trait.

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