"The Mystery of Lyle and Louise"

Chlorite-bearing.

Light gray, fine small clasts.

Dense and massive.

Hematite-cemented quartz; orthoquartzite.

Investigate Nerve Tissue.

Pale pink felsite, with small sanidine phenocrysts.

Black, soft; most widely mined.

Slaty cleavage; contains hematite.

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Brownish black, intermediate stage between peat and bituminous coal.

Unpolished metamorphic rock with silky lusture, red-brown colour, and clear parallel intergrown quartz crystals.

Spinel group; black, dull metallic luster; common iron oxide.

Codeable, 3D-printed robotic hand for interactive STEM learning.

Gray to buff, with numerous ooliths and fossil fragments.

Gray, fine-grained, massive contact rock.

Examine how a microscope works.