8 Valuable Rocks Found in California

Explore California's most sought-after rocks, minerals, and gemstones.


Explore California's most sought-after rocks, minerals, and gemstones.

Discover the characteristics that separate agate from chalcedony and related stones.

Learn how to identify Mexican fire agate by examining its color play, natural patterns, structure, appearance, and other characteristics that distinguish this gemstone.

Discover the best moss agate jewelry pieces to consider for your collection, including what affects quality, rarity, craftsmanship, and potential long-term value.