White Moonstone

White Moonstone tumbled

What is White Moonstone?

A well-known member of the feldspar group, white Moonstone is renowned for its shimmering white luster; in fact, the ancient Romans believed this stone to have been formed from solidified moonlight. Although it is the state gemstone of Florida (to honor the Apollo moon landings), it is not actually found in that state.

Optical Properties

Refractive Index: 1.514-1.539
Birefringence: 0.008-0.010
Pleochroism: Weak
Optical Character: Biaxial negative

Market Value Factors

Pricing varies for every rock and mineral, so use these universal factors to gauge White Moonstone before comparing listings or appraisals.

Size & Weight

Larger, intact specimens usually command higher prices.

Rarity & Demand

Scarce material or popular varieties sell at a premium.

Condition & Finish

Chips, repairs, and heavy wear lower value; clean prep helps.

Treatment & Provenance

Untreated specimens with documented locality are prized.

Applies to all rocks & minerals.

Where to Find White Moonstone

White Moonstone is a variety of Microcline. RockHoundR, the free-to-download rockhounding map from the Ruby Glint team, shows where collectors find microcline in the US, with land-access notes for BLM land and national forests. Collecting is banned in national parks.

See where to find microcline

Always check the local rules and get the landowner's permission before you collect.