Mineralogy_Aggregate Crystal Habits

Question 1

Branching, tree-like clusters similar to dendritic

Answer 1

Arborescent

Question 2

Resembling grape bunches with interlocking rounded masses.

Answer 2

Botryoidal

Question 3

A branching growth of crystals usually on a surface or as an
inclusion that forms plant-like patterns similar to “Jack Frost” on windows
and similar to arborescent, but less tree-like

Answer 3

Dendritic

Question 4

Outwardly oriented crystals usually lining the inside of a geode,
but is also applied to other outwardly oriented crystal coatings

Answer 4

Druse

Question 5

Thin crust of crystalline material over host rock

Answer 5

Encrusting

Question 6

A hollow stone embedded in a layer of rock mineralogically
different from the mineral composing the outer shell

Answer 6

Geode

Question 7

Bubbly, rounded masses, similar to botryoidal or mammillary but
less coherent

Answer 7

Globular

Question 8

Crystals of a small size, less than 1 cm across, that exhibit no really discernable crystal form

Answer 8

Granular

Question 9

Layered masses like sheets of paper

Answer 9

Lamellar

Question 10

Rounded, literally “breast-like” masses, similar to botryoidal and
globular but more rounded, larger individual masses.

Answer 10

Mamillary

Question 11

Indiscernible masses of crystals usually too fine to see.

Answer 11

Massive

Question 12

Flaky to platy crystals compacted together in sparkling masses.

Answer 12

Micaceous

Question 13

A stone of concentric growth around a center usually composed
of mostly one mineral.

Answer 13

Nodular

Question 14

Rounded pebble to sand sized nodules in a compact mass
formed in sedimentary environs.

Answer 14

Oolitic

Question 15

Rounded marble to pebble sized nodules in a compact mass
formed in certain sedimentary environments.

Answer 15

Pisolitic

Question 16

Distinct crystals arranged in an orientation outward from a
common point.

Answer 16

Radiating

Question 17

Petal-like crystals arranged in a flattened radial habit around a
central point.

Answer 17

Rosette

Question 18

A concretionary growth sometimes around a hollow tube,
producing long, slowly tappering, rounded masses.

Answer 18

Stalactic

Question 19

Similar to botryoidal,but with more crystalline components in the
interlocking rounded masses.

Answer 19

Sub-botryoidal

Question 20

A void in a rock whose “shell” contains the same mineral as the
host rock.

Answer 20

Vugs

Question 21

no symmetry is present

Answer 21

Amorphous