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. - For Age 6+Yrs

Crystal & Aggregate Collection

Crystal & Aggregate Collection


  • 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

Price: $26.75
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Manufactured by Hubbard Scientific, Co.


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