Sedimentary And Igneous (Mixed)

Concrete-like aggregate surface with embedded rock fragments

Anthropogenic concrete or exposed aggregate; not a natural rock specimen

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

Lithified polymictic gravel; clasts may include basalt, granite, quartzite, and other silicates

Iron-rich concretion or weathered ironstone

Goethite–hematite-rich limonite (FeO(OH)·nH₂O / Fe₂O₃)

Mixed Crushed Stone

Aggregate (varied mineral composition)

Lava Stone and Chakra Beads

Basalt (with various mineral/synthetic beads)

Copper Ore

Cupriferous Rock / Mixed Mineral Matrix

Metallic sulfide mineral specimen, likely pyrite-bearing ore

Likely pyrite (FeS₂), possibly mixed with other sulfides or host rock

Mookaite Jasper

Silicified Radiolarite (SiO2 with iron impurities)

Coarse-grained granite

Granite, composed chiefly of quartz, potassium feldspar, plagioclase, and biotite/hornblende

Gravel (mixed crushed stone)

Unidentified aggregate of crushed natural rock fragments

Lapis Lazuli

Lapis Lazuli (Rock containing lazurite, calcite, and pyrite)

Mixed stream-worn rocks, likely including quartz-rich gravel

Composition indeterminate; visible material may include quartz (SiO₂) and assorted lithic fragments

Quartz with impurities or Host Rock

SiO2 (Silicon Dioxide) with mixed silicates

Pink Granite (Gneissic Granite)

Granite (composed primarily of Quartz, K-Feldspar, and Plagioclase)

Granodiorite

Granodiorite (containing Plagioclase, Quartz, K-Feldspar, and Hornblende or Biotite)

Pink Granite

Granite (rich in Potassium Feldspar/Orthoclase)

Sandstone (lithic wake/graywacke variety)

Arenite/Greywacke (SiO2 with lithic fragments)

Asphalt Concrete

Bituminous conglomerate

Mixed Mineral Specimens

Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)

Tumbled polymictic stone, likely jasper-bearing conglomerate

Siliciclastic conglomerate with microcrystalline quartz (jasper/chert) and altered volcanic or feldspathic clasts

Granite

Phaneritic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Yellow Ochre (Limonite)

Limonite (FeO(OH)qnH2O)

Breccia

Breccia (Clastic sedimentary rock)

Pink Granite

Phaneritic Felsic Igneous Rock

Glacially transported granite and gneiss boulders

Granite (quartz–feldspar–mica); banded specimens likely gneiss

Mixed river pebbles, likely including quartz-rich rocks

Unidentified mixed lithologies; the pale pieces appear quartz- or feldspar-rich, but the image is insufficient for a specific identification

Pebble with dark mineral inclusion

Likely granitic or gneissic quartz–feldspar pebble with a mafic inclusion; exact identification requires testing

K-feldspar Granite / Red Granite Fragment

Alkali feldspar granite (Plutonic igneous rock)

Agate and Chalcedony

Silicon Dioxide (SiO2)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Jasper / Agate with Petrified Wood Inclusion

SiO2

Polymictic conglomerate

Clast-supported conglomerate, typically quartz- and feldspar-rich in a dark matrix

Dragon Blood Jasper

Epidote with Red Jasper (Quartz-rich aggregate)

Puddingstone

Conglomerate

Likely iron-rich river cobble (weathered basalt or ironstone)

Indeterminate; possibly weathered basalt, with hematite/goethite staining

Jasper containing Agate (Jaspagate)

Silicon Dioxide (SiO2)

Conglomerate (possibly concrete-like natural breccia)

Lithified, poorly sorted clastic rock with angular to subrounded mineral and rock fragments in a finer matrix

Mookaite Jasper

Silicified Radiolarite (SiO2)

Gravel or Pebble

Clastic Sedimentary Grain (typically composed of Quartz or Silicate minerals)

Purple Lepidolite with Quartz

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Weathered granitic rock

Granite (quartz–feldspar–mica intrusive rock; exact variety uncertain)