natural rock specimen of eudialyte, a rarity minor gemstone, in nepheline syenite with crystals of microcline, nepheline and

sample surface stone specimen zirconium rock pink ornamental object natural macro geology geological mineral gemology collection gemstone eudialyte small piece ore textured little crystal background structure gem red material texture raw purple gemmology gemmological gemological shooting decorative igneous dark black close up white alkaline aegirine spar closeup cobble crystalline eudalite feldspar