"Avantor"

Formalin preserved lancelet. Available in vials or jars.

Formalin preserved Taenia. Available in jars or vials.

Dehydrated Preserved

Abundant small black phenocrysts in a gray to brown matrix.

Dark gray with abundant gas pocket vesicles.

Pale pink felsite, with small sanidine phenocrysts.

Red, medium, to coarse-grained iron oxide cement; shows hematite bands.

Cool and colorful dragons liven up genetics lessons.

Improved Formula for Higher Yields

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.