Minerals are combinations of the elements of the earth. They can be identified by luster, color, hardness, specific gravity, density and cleavage, and by their crystal form. This program will deal with these forms. When the minerals solidify in cavities without interference with solid substances, they usually assume shapes which are characteristics of each particular mineral. To a physicist the crystal arrangement describes the internal arrangement of atoms. To the amateur observer the large well-formed crystals are beautiful examples of symmetry in nature. Some crystals are angular, others are then and needle-like; some dendritic or branching like limbs of a tree; others botryoidally or grapelike. You will see some common crystal forms: quartz, feldspar, mica, obsidian, garnet, magnetite, hematite, fluorite, calcite, dolomite, pyrite, gypsum, sugar, and salt.
Mary Lela Grimes; Robert Larsen; Betty Sears; WGBH-TV; Children's Museum of Boston; Massachusetts Audubon Society; Lowell Institute Cooperative Broadcasting Council
National Educational Television; Indiana University Audio-Visual Center
Crystals ; Minerals.
- Rights Statement
- No Copyright - United States
- Physical Description
1 Film (0:29:27); 16mm
- Other Identifiers
IULMIA Film Database: 40000003272434; Other: GR00404486; MDPI Barcode: 40000003272434
This item is accessible by: the public.