- Okenite by Webster's
(n.) A massive and fibrous mineral of a whitish color, chiefly hydrous silicate of lime.
- Fergusonite by Webster's
(n.) A mineral of a brownish black color, essentially a tantalo-niobate of yttrium, erbium, and...
- kainosite by Melanie Alvarez
(mineralogy) Ca 2(Ce,Y) 2(SiO 4) 3CO 3·H 2O A yellowish-brown mineral composed of a hydrous...
- Mesolite by Webster's
(n.) A zeolitic mineral, grayish white or yellowish, occuring in delicate groups of crystals, also...
- hellandite by Crystal Carlson
(mineralogy) Mineral composed of silicate of metals in the cerium group with aluminum, iron,...