Identify any rockfrom a photo.

Amber

Fossilized tree resin; predominantly polymerized terpenoid compounds (succinite)

Blue Obsidian

Obsidian

Quartzite

Quartzite

Tumbled yellow jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Amber (polished piece)

Fossilized tree resin; amber is an organic mineraloid, not a true mineral

Unidentified pale blue-green stone

Not identifiable from this image; possibly amazonite (microcline feldspar)

Yellow Sapphire (Pukhraj)

Corundum (Al2O3)

Tumbled amethyst

Quartz (SiO₂), purple variety known as amethyst

Likely milky quartz, possibly quartz-rich vein rock

Quartz (SiO₂); identification from the image is uncertain

Pink feldspar-rich granite

Granite, composed chiefly of quartz, potassium feldspar, and plagioclase, with minor mica or other minerals

Iron-rich quartz specimen (likely hematite/goethite-coated quartz)

Quartz (SiO₂) with iron oxides, chiefly hematite (Fe₂O₃) and/or goethite (FeO(OH)); precise identification requires testing

Weathered quartz-rich rock fragment

Likely felsic igneous rock, possibly granite or granitic pegmatite; exact identification is uncertain from the photo