Day 2 Flashcards
A crystal that lacks well-developed crystal faces or that has rounded or irregular form due to crowding by adjacent crystals.
a. euhedral
b. subhedral
c. anhedral
d. polyhedral
c. anhedral
Brazil Law is a common type of twinning in which mineral?
a. plagioclase
b. orthoclase
c. pyroxene
d. quartz
d. quartz
In which atomic model do electrons orbit around the nucleus?
a. Bohr’s Model
b. Rutherford’s Model
c. Thomson’s Model
d. Dalton’s Model
a. Bohr’s Model
Which of the following Does NOT belong to the Lanthanide Series?
a. cerium
b. europium
c. ytterbium
d. uranium
d. uranium
Who classified elements based on their behavior in a hypothetical iron alloy-silicate-sulfide-gas system?
a. Agricola
b. Goldschmidt
c. Bowen
d. Sorby
b. Goldschmidt
This defect occur when an atom is displaced from the position it normally occupies to an interstitial site.
a. Schottky
b. Frenkel
c. Edge dislocation
d. Screw dislocation
b. Frenkel
Which of the following is NOT a feldspathoid?
a. leucite
b. nepheline
c. sanidine
d. sodalite
c. sanidine
Which of the following minerals DOES NOT contain titanium in its chemical formula?
a. akermanite
b. ilmenite
c. rutile
d. titanite
a. akermanite
Scheelite is a mineral under which class?
a. chromates
b. vanadates
c. tungstates
d. phosphates
c. tungstates
Which of the following minerals is under the scapolite group?
a. cordierite
b. heulandite
c. tridymite
d. analcime
b. heulandite
Which of the following minerals is a nesosilicate?
a. tremolite
b. esntatite
c. akermanite
d. forsterite
d. forsterite
What is the Si:O ratio of phyllosilicates?
a. 2:5
b. 4:11
c. 1:3
d. 1:2
a. 2:5
What is the luster of sphalerite?
a. resinous
b. vitreous
c. greasy
d. adamantine
a. resinous
Very small amounts of which metal in the crystal structure of ruby gives its deep red color?
a. zinc
b. iron
c. titanium
d. chromium
d. chromium
The following minerals has a streak of shades of yellow, EXCEPT:
a. orpiment
b. zincite
c. sulfur
d. chrysocolla
d. chrysocolla
It is the ability of minerals to give off visible light when they are struck by energy of a shorter wavelength even after the energy source is turned off.
a. fluorescence
b. phosphorescence
c. thermoluminescence
d. triboluminescence
b. phosphorescence
Which variety of K-feldspar exhibit opalescence?
a. amazonite
b. moonstone
c. sunstone
d. specrolite
b. moonstone
Which term is sued to describe a mineral habit that is needle-like?
a. acicular
b. capillary
c. filifom
d. reticulated
a. acicular
This term describes a mineral of which it is capable of being drawn into a wirelike shape.
a. malleable
b. brittle
c. sectile
d. ductile
d. ductile
Which of the following asbestiform minerals is also known as a blue asbestos?
a. chrysotile
b. crocidolite
c. amosite
d. actinolite
b. crocidolite
