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The rhombic dodecahedron and the common trapezohedron are the most common forms.
You must take the shining trapezohedron and keep it in a safe deposit box, until you are ready to come to Nigeria.
First-generation crystals are rarely noted as minute orange-colored trapezohedra associated with the stratified layers of laumontite and stilbite, discussed below.
These crystals occur in amygdaloidal cavities, either as massive fillings or as linings of trapezohedral crystals that rarely exceed 1 cm across.
The crystals have sharp trapezohedral faces; they have a glassy luster and are quite transparent when unweathered.
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