Moonstone vs. Sunstone

Moonstonenoun

(mineral) A translucent gemstone, an orthoclase feldspar, that has a pearly lustre.

Moonstonenoun

A nearly pellucid variety of feldspar, showing pearly or opaline reflections from within. It is used as a gem. The best specimens come from Ceylon.

Moonstonenoun

a transparent or translucent gemstone with a pearly luster; some specimens are orthoclase feldspar and others are plagioclase feldspar

Sunstonenoun

(mineral) A translucent form of feldspar having flakes of hematite, used as an ornamental stone.

Sunstonenoun

Aventurine feldspar. See under Aventurine.

Sunstonenoun

a translucent quartz spangled with bits of mica or other minerals

Sunstone

Sunstone is a plagioclase feldspar, which when viewed from certain directions exhibits a spangled appearance. It has been found in Southern Norway, Sweden, various United States localities and on some beaches along the midcoast of South Australia.