| This basic habit varies from squat bladelike individuals to acicular stellate groups and individuals with a tabular cross section. |
| In the Monte Calvario area, the fluoro-edenite mineralization process yielded mainly prismatic, evenly sized acicular crystals. |
| Epididymite was known several years ago from a few small crystals that occurred on some specimens and also as inclusions of white acicular crystals in smoky quartz. |
| The beryl inclusions occur as acicular to hairlike crystals of aquamarine, pale bluish-green in color and clearly hexagonal in cross section. |
| Small acicular rutile crystals are found in cavities in various quarries in the Carrara, Tuscany district, Italy. |
| Dark green, acicular crystals of actinolite can be collected from this quarry, which is smaller and older than the Metronite quarry. |
