Identify any rockfrom a photo.

Likely tumbled lepidolite-bearing mica schist

Lepidolite-rich mica schist; chiefly lepidolite/muscovite mica, quartz, and possibly feldspar

Iron meteorite candidate

Probable iron-rich meteorite; possible stony-iron or weathered nickel–iron alloy

Vesicular basalt (probable scoriaceous basalt)

Basalt, composed mainly of plagioclase feldspar, pyroxene, and commonly olivine

Botryoidal hematite–goethite specimen (probable)

Hematite (Fe₂O₃) with goethite (FeO(OH)), possibly limonite

Chert or chalcedony nodule

Microcrystalline quartz (SiO₂), possibly weathered chert

Serpentine-rich metamorphic rock (possibly serpentinite)

Serpentinite; chiefly antigorite, lizardite, or chrysotile with possible magnetite and carbonate minerals

Weathered granitoid rock

Granite or granitic gneiss; chiefly quartz, feldspar, and mica

Banded gneiss pebble

Gneiss, commonly quartz–feldspar–mica bearing

Rounded quartz-rich river pebble

Feldspathic quartz sandstone or quartzite pebble (exact identification requires testing)

Native gold-bearing quartz/rock specimen

Native gold (Au) in quartz and iron-oxide matrix

Pyrite-bearing granite with a golden sulfide inclusion

Granite; likely pyrite (FeS₂), possibly chalcopyrite (CuFeS₂)

Tumbled brown jasper (likely common jasper or chert)

Microcrystalline quartz, SiO₂, chiefly chalcedony/quartz with iron-oxide impurities