| Kieli | Käännökset |
|---|---|
| ranska | minéral accessoire |
| Monikko | accessory minerals |
(mineralogy) any mineral that is present in small amounts in a rock, but is not considered to be characteristic of the rock
Schist is a metamorphic rock characterized by an abundance of platy minerals. In this example, the rock has prominent sillimanite porphyroblasts as large as 3 cm (1.2 in).