Rock sample of minette from the museum in Jáchymov in northwestern Bohemia. Minette is a lamprophyre with prevailing K-feldspars over plagioclase, common biotite and minor hornblende. Augite and olivine may be present.
<a href="//commons.wikimedia.org/wiki/User:Pelex" title="User:Pelex">Pelex</a>
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<span class="int-own-work" lang="en">Own work</span>