Rhomboidal Calcite Crystal
Rhomboid: “Traditionally, in two-dimensional geometry, a
rhomboid is a parallelogram in which adjacent sides are of unequal lengths and
angles are non-right angled. A parallelogram with sides of equal length is a rhombus
but not a rhomboid (Wikipedia).
The adjective rhomboidal
refers to both Rhombus and Rhomboid shapes.
As in: "Hey Jeff! I observe that there is a rhomboidal stone artistically placed in a stacked row of stones on the edge of an outcrop at your Flickr Photostream."
As in: "Hey Jeff! I observe that there is a rhomboidal stone artistically placed in a stacked row of stones on the edge of an outcrop at your Flickr Photostream."
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