Feldspar – Page 3 – Gemstone Dictionary

Bytownite – Calcium‑Rich Plagioclase Feldspar Gemstone

January 13, 2026 | Gemstone Encyclopedia | Joaquimma Anna

Bytownite is a calcium‑rich member of the plagioclase feldspar series, valued for its clear to milky white hues and good durability. It is used in fine jewelry, collectors’ pieces, and is prized for its subtle sparkle and historic significance.

Nosean – Blue Feldspathoid Gemstone Overview, Meaning, and Care

January 6, 2026 | Gemstone Encyclopedia | Joaquimma Anna

Nosean is a blue to blue‑green feldspathoid mineral valued for its striking color and cubic crystal habit. Used sparingly in jewelry, it appeals to collectors and those drawn to its traditional meanings of clarity, communication, and calm.