Violet Anderson Royal Ontario Museum Nenadkevichite occurs at Mont Saint-Hilaire mostly as pseudomorphs after s randite. Color ranges from colorless to pale pink, rose-pink, orange and brownish red. Diaphaneity is transparent to translucent for the crystals and opaque for the aggregates. Crystal Habits include masses to several cm across of intergrown small crystals. Superb 1-8mm prismatic and very thin tabular single crystals as stacked clusters of compact spherical aggregates.
Fracture is uneven.
3 Streak is white. Associated Minerals include aegirine, albite, amphibole group, analcime, ancylite, astrophyllite, bastn site, calcite, catapleiite, chlorite group, donnayite, elpidite, epididymite, eudialyte, fluorapatite, fluorite, hilairite, mangan-neptunite, microcline, monteregianite, natrolite, polylithionite, pyrite, pyrochlore, rhodochrosite, rutile, s randite, sphalerite, steacyite and yofortierite.