KnowraFeldspathoidLinked fromLinked fromThe 3 pages that link to Feldspathoid, each with the reason it gives.All 3Narrower topic 3SodaliteNarrower topic: Sodalite belongs to this mineral group, which forms in silica-undersaturated rocks.HauyneNarrower topic: Hauyne belongs to this mineral group, which forms in silica-undersaturated rocks.TugtupiteNarrower topic: Tugtupite belongs to this mineral group and forms where silica is scarce.