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SCOTT NO
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N4072 1329
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DATE OF ISSUE
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2000 Jan 01
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FACE VALUE
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60ch
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COUNTRY
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Democratic people's republic Korea
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DESCRIPTION
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The stamp shows Graphite. It is one of the world's softest minerals. It occurs in igneous & metamorphic rocks. It is used for dry & wet lubrication & for chemical purposes. Its latest use is as a moderator to slow down neutrons in nuclear reactors.
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MINERAL
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Other
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VARIATION
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Error, Meter Mark, Block, Proof, First Day Cover, PC, Postal Stationery, Envelope
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