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By: Hubbard Scientific, Co.
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Crystal & Aggregate Collection
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Part Number: 727953202175
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Contains 15 specimens, approximately 1 1/2" x 1 1/2" showing different crystal habits and aggregation of minerals such as dendritic, fibrous, micaceous, banding, and radiated.
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This Item Is In Stock
- Contains 15 specimens, approximately 1 1/2" x 1 1/2" showing different crystal habits and aggregation of minerals such as dendritic, fibrous, micaceous, banding, and radiated.
- Many minerals form distinct crystal patterns as the crystals grow.
- Minerals may form isolated or distinct crystals, in radiating or parallel groups, or in a collection of crystals call aggregates. Aggregates of minerals sometimes are composed of scales or lamellae or of grains.
- Below is a list of terms geologists use to describe these crystal habits:
ACICULAR -slender, needle like crystals
BANDED -narrow bands of differing colors
BOTRYOIDAL -globular forms like a bunch of grapes
COLLOFORM -spherical forms of radiating crystals
CONCENTRIC -spherical layers around a common center
DENDRITIC -slender divergent branches
FIBROUS -slender fiber aggregate of crystals
FOLIATED -easily separated into plates
GLOBULAR -radiating crystals forming small spheres
LAMELLAR -plate like crystals forming layers
MASSIVE -a mineral without distinguishing features or form
OOLITIC -aggregate of small spheres resembling fish eggs
RADIATED -radiating crystal groups
RETICULATED -lattice like groups of crystals
STALACTITIC-conical/cylindrical deposits of minerals
AMYGDALOIDAL -a rock with mineral filled cavities
BLADED -elongated, flattened crystals
CAPILLARY -hair like crystals
COLUMNAR -column like crystal
CONCRETION -minerals formed around a nucleus
DRUSY -a layer of small crystals on a surface
FILIFORM -embedded threadlike crystals
GEODE - a spherical hollow cavity lined by a mineral(s)
GRANULAR -composed of grain like crystals
MAMMILLARY -large round masses resembling mammae
MICACEOUS -easily separated into thin sheets
PISOLITIC -aggregate of spheres the size of peas
RENIFORM -radiating crystals forming kidney shapes
ROSETTE- a flowerlike crystal growth of minerals
STELLATED -radiating crystals forming circular groups
MINERAL STATE OF AGGREGATION
1. Actinolite Acicular
2. Rutile in Quartz Filiform
3. Wavellite Radiated/Stellated
4. Barite Rosette
5. Vanadinite Drusy
6. Spodumene Columnar
7. Gypsum var. Satin Spar Fibrous
8. Biotite Micaceous
9. Barite Lamellar/Tabular
10. Olivine Granular
11. Hematite Oolitic
12. Bauxite Pisolitic
13. Onyx Banded
14. Chalcedony Massive
15. Gypsum var. Alabaster Massive
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