| Title | Comment | Keywords |
|---|---|---|
| Atomic Structure | 06:08 - 07:26 (01:18) / 1.7 MB | mineral, "atomic structure", atom, crystal, "chemical bond", ion |
| Mineral's Environment of Formation | 17:33 - 19:00 (01:27) / 1.6 MB | "J. Lawford Anderson", mineral, "atomic structure", "physical property", diamond, graphite, "environment of formation", "crystal structure", gem, carbon, atom, "covalent bond", "soft bond", hardness |