Pyroxene (with cleavage) and olivine (without cleavage) in a Calc-silicate marble from Brasil. Crossed nicols image, magnification 2x (Field of view = 7mm)
<a href="//commons.wikimedia.org/wiki/User:Strekeisen" title="User:Strekeisen">Strekeisen</a>
<span class="int-own-work" lang="en">Own work</span>