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A light yellow, red-brown, or black mineral, SnO2, that is an important tin ore. Also called tinstone.

[French cassitérite, from Greek kassiteros, tin.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Minerals) a black or brown mineral, found in igneous rocks and hydrothermal veins. It is a source of tin. Composition: tin oxide. Formula: SnO2. Crystal structure: tetragonal. Also called: tinstone
[C19: from Greek kassiteros tin]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(kəˈsɪt əˌraɪt)

a brown or black mineral, tin dioxide, SnO2, usu. found as fibrous masses or placer deposits; the chief ore of tin.
[1855–60; < Greek kassíter(os) tin + -ite1]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cassiterite - a hard heavy dark mineral that is the chief source of tin
atomic number 50, Sn, tin - a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
'It was used to illegally extract cassiterite. Artisan miners were warned against the extraction and abandoned the site, leaving it uncovered,' he said.
Brilliant luster is stunning in stibnite, cassiterite, quartz, vivianite and gold.
Scheelite, tetrahedrite, cassiterite, pyrrhotite and fibrous sulfosalts including jamesonite and boulangerite are locally important and have been collected specifically for their specimen value.
Occurrence: Nikischerite does not occur in the cassiterite-bearing veins themselves, but rather in a later, low-temperature paragenesis filling fault zones which cut across the cassiterite veins.
Beautiful specimens showing large, lustrous, deep orange crystals of scheelite associated with brilliant black twinned cassiterite crystals and tabular, gemmy crystals of aquamarine beryl on beds of muscovite crystals are characteristic of Mount Xuebaoding, Sichuan Province, China.
Last year, the Rwanda Mines Petroleum and Gas Board introduced stringent law in a bid toban artisanal mining saying the regulation is intended to attract "serious" investors who can afford modern practices that are not harmful to the environment and the miners.The mining sector generated $373 million in revenue from its principle minerals cassiterite, coltan and wolfram, in 2017 up from $166 million the previous year.
it's all about seams of the mineral cassiterite and the tin dioxide therein..