"Ward's® Thermochemistry In The Bag Inquiry Demonstration Activities"

Light pink, massive, crystalline, translucent.

Feldspar group; white to gray, sodium plagioclase cleavages; some faces may show twinning.

Feldspar group; greenish gray alkali feldspar, coarse crystalline, some iridescence.

Spinel group; iron-black, massive; natural magnet.

Pyroxene group; dark green, pure cleaved fragments.

Deep purple crystal clusters.

Deep blue, massive, with nepheline; key feldspathoid.

Dark brown to black; polycrystalline zinc ore.

Exemplary display of hexoctahedral crystal shape.

Feldspar group; calcium end member plagioclase crystals in pyroxene matrix.

When minerals, rocks, and fossils cannot be accurately identified by macroscopic observation and testing, thin section slides can reveal the composition and structure of the specimens on a microscopic level.

When minerals, rocks, and fossils cannot be accurately identified by macroscopic observation and testing, thin section slides can reveal the composition and structure of the specimens on a microscopic level.

When minerals, rocks, and fossils cannot be accurately identified by macroscopic observation and testing, thin section slides can reveal the composition and structure of the specimens on a microscopic level.

Feldspar group; pink cleavages showing perthitic texture, common potassium feldspar, Mohs’ hardness of 6.

When minerals, rocks, and fossils cannot be accurately identified by macroscopic observation and testing, thin section slides can reveal the composition and structure of the specimens on a microscopic level.

When minerals, rocks, and fossils cannot be accurately identified by macroscopic observation and testing, thin section slides can reveal the composition and structure of the specimens on a microscopic level.