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Monticellite: CaMgSiO4 Melilite: (Ca,Na)2(Al,Mg,Fe++)(Si,Al)2O7
Comments: Thin-section image of monticellite interstitial between unaltered melilite crystals (CanMin v. 41. p 1259). Location: Skarns along the contact of a diorite intrusion at Oravit¸a, Banat, in Romania. Scale: Field of View 2.7 mm. © Canadian Mineralogist
Monticellite: CaMgSiO4
Comments: Pale brown crystalline massive monticellite. Location: Crestmore Quarry, Riverside County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species