Metamorphic Or Igneous Alteration

Granite

Phaneritic intrusive igneous rock

Serpentinite (likely serpentinized ultramafic rock)

Serpentine-group minerals, chiefly antigorite/lizardite; commonly derived from peridotite

Basalt (with possible Serpentinization)

Mafic Igneous Rock (primarily Plagioclase and Pyroxene)

Gneiss with Iron Staining and Sulfide Mineralization

Metamorphic Gneiss / Amphibolite with Iron/Sulfide Oxidation

Weathered volcanic rock fragment

Likely andesite or basalt; exact identification requires fresh surface and testing

Magnetite (Lodestone variety)

Magnetite (Fe3O4)

Rhodonite

Rhodonite (Mn,Fe,Mg,Ca)SiO3

Serpentine-rich rock (likely serpentinite)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, carbonate, or talc

Weathered quartz-rich rock, likely quartzite

Quartzite; predominantly crystalline SiO₂ with minor iron-oxide staining

Rounded greenstone pebble

Likely serpentinite or chlorite-rich metamorphic rock; exact identification requires testing

Greenstone / altered basalt fragment

Likely chlorite–epidote–actinolite altered basalt; exact identification requires testing

Weathered basalt pebble

Basalt, a fine-grained mafic volcanic rock; likely containing plagioclase and pyroxene with weathering products

Pebble with vesicles, likely basalt

Vesicular basalt; chiefly plagioclase, pyroxene, and iron-magnesium minerals

Weathered iron-rich rock, possibly laterite or altered basalt

Probable ferruginous basalt/lat eritic material; exact identification requires testing

Granite (likely weathered biotite granite)

Coarse-grained felsic plutonic rock; quartz + alkali feldspar/plagioclase + biotite/hornblende

Polished Tiger’s Eye

Tiger’s eye quartz; SiO₂ with parallel crocidolite-derived inclusions

Green jade bangle

Jadeite or nephrite (jade); exact species cannot be confirmed visually

Hematite (Specularite)

Fe2O3 (Iron(III) oxide)

Tumbled banded stone, likely serpentine or chlorite-rich rock

Probable serpentinite (serpentine-group minerals: Mg₃Si₂O₅(OH)₄), possibly greenstone

Greenstone / serpentine-rich metamorphic rock

Likely serpentinite, composed mainly of serpentine-group minerals (antigorite, lizardite, or chrysotile), with possible magnetite and chlorite

Serpentine (likely serpentine-rich pebble)

Serpentine-group minerals, chiefly antigorite and/or lizardite; commonly associated with magnetite and chlorite

Greenstone pebble (likely serpentinite or altered basalt)

Serpentinite, predominantly serpentine-group minerals; exact identification requires testing

Polished orbicular jasper (likely kambaba jasper)

Silicified microcrystalline quartz/chalcedony, commonly with chlorite- or amphibole-rich orbicules; composition varies

Serpentine (possibly New Jade)

Serpentine group, Mg3Si2O5(OH)4

Serpentine

Serpentinite (group of hydrous magnesium iron phyllosilicate minerals, e.g., Lizardite, Antigorite)

Unakite

Epidotized Granite

Unakite

Epidote–orthoclase–quartz metamorphic rock

Polished serpentine (likely bowenite)

Serpentinite; predominantly antigorite/lizardite Mg₃Si₂O₅(OH)₄, possibly with magnetite and carbonate

Serpentine

Antigorite, Lizardite, or Chrysotile (Mg,Fe)3Si2O5(OH)4

Jade

There are two distinct minerals commonly known as Jade: Jadeite (NaAlSi2O6) and Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2). Based on the appearance, these spheres are likely Nephrite.

Weathered basalt with iron-oxide alteration

Basalt, principally plagioclase and pyroxene, with secondary iron oxides/hydroxides

Uncertain polymict breccia or altered volcanic rock

Likely hydrothermally altered volcanic breccia; exact mineral identification requires testing

Quartz-rich breccia or altered granite fragment

Polymineralic quartz–feldspar rock, likely hydrothermally altered granite/pegmatite

Quartz crystal fragment in weathered host rock

Quartz (SiO₂), possibly in a feldspathic or iron-stained matrix

Basalt with Epidote (Porphyritic Basalt)

Mafic Porphyritic Basalt with (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) inclusions

Tumbled serpentine

Serpentinite; chiefly antigorite, lizardite, and/or chrysotile serpentine-group minerals

Polished feldspar-rich granite

Granite, primarily quartz (SiO₂), feldspar, and mica

Polished/tumbled banded marble or calc-silicate rock

Foliated calcitic marble, possibly serpentinite-bearing; primarily calcite (CaCO₃) with gray silicate minerals

Tumbled serpentine-rich stone

Serpentinite, likely with yellow limonite/goethite or epidote alteration

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

Tumbled jasper or porphyritic volcanic stone

Likely altered basalt/andesite with quartz, feldspar, and iron-oxide minerals

Hematite

Iron(III) oxide (Fe2O3)