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| | | | |  | Knowledge is Everything |  | Aquamarine | | | Aquamarine is one of our most popular and best-known gemstones, and distinguishes itself by many good qualities. It is almost as popular as the classics: ruby, sapphire and emerald. In fact it is related to the emerald both belonging to the beryl family. The colour of aquamarine, however, is usually more even than that of the emerald. Much more often than its famous green cousin, aquamarine is almost entirely free of inclusions.   |
|  | Coral | | | Coral makes jewellery of a very special fascinating charm: the perfect embodiment of mankinds yearning for summer, sun and faraway seas.   |
|  | Prehnite | | | With its bright, almost luminescent green coloring Prehnite is an attractive mineral that can have a very good luster. It forms in cavities in basaltic rocks. Prehnite is a hydrous, calcium-aluminum-silicate mineral, which is commonly found in cavities and "pillows" and along fractures of basalt and diabase rock.   |
|  | Tetrahedron | | | A tetrahedron (plural: tetrahedra) is a polyhedron composed of four triangular faces, three of which meet at each vertex. A regular tetrahedron is one in which the four triangles are regular, or "equilateral," and is one of the Platonic solids.   |
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