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Jet
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Cape Mondego Mine, Cape Mondego, Buarcos, Figueira da Foz, Coimbra District, Portugal
© Martins da Pedra
A variety of Lignite
A hard, "gem" variety of lignite.
Visit gemdat.org for gemological information about Jet. Currently in public beta-test.
A hard, "gem" variety of lignite.
Visit gemdat.org for gemological information about Jet. Currently in public beta-test.
















