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Comments: Pale brown crystalline massive monticellite.
Location: Crestmore Quarry, Riverside County, California, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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 Oravitła, Banat, in Romania.
Scale: Field of View 2.7 mm.
© Canadian Mineralogist