Further, unlike diamond, it never occurs as distinctly developed crystals, but only as imperfect six-sided plates and scales.
The very beautiful (anhydrous) crystals have the habit of a double six-sided pyramid, but really belong to the rhombic system.
Lanthanum sulphate, La2(S04)3.9H20, forms six-sided prisms, isomorphous with those of the corresponding cerium salt.
On cooling the salt separates as white six-sided tablets.
high, consisting of a six-sided lantern and royal crown, both sculptured, and resting on the intersections of two arched ornamental slips rising from the four corners of the top of the tower.