1. a yellow to brown mineral consisting of hydrated iron and potassium sulfate, commonly found in oxidized iron ore deposits
Usage: mineralogy

Examples

• The geologist identified jarosite crystals in the weathered pyrite sample.
• Jarosite formation indicates the presence of acidic, oxidizing conditions.
• The yellow coating on the rock surface was determined to be jarosite.
• Mining operations often encounter jarosite in iron-rich environments.
• Scientists study jarosite on Mars as evidence of past water activity.
• The mineral collection included a specimen of jarosite from Arizona.