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SCOTT NO
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242 A32
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DATE OF ISSUE
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1978 Jun 09
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FACE VALUE
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20 p
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COUNTRY
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Tristan Da Cunha
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DESCRIPTION
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The multicolored stamp shows lava containing Pyroxene Crystals. They are common rock forming minerals and are represented in most igneous and many metamorphic rocks. Their presence in rock indicate a high temperature of crystallization with lack of water.
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MINERAL
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Pyroxene
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VARIATION
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Meter Mark, First Day Cover, Envelope
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