Some examples from this set of practice questions
1.
Crystallinity
Answer: relative proportions of glass to crystal
2.
holocrystalline
Answer: 100% crystals
3.
hypocrystalline;
Answer: mix of crystlas and glass
4.
aphanitic;
Answer: crystals only visible with magnification
5.
microlitets;
Answer: very small crystals in a glassy matrix only visible in thin section
6.
phaneritic
Answer: crystals visible with the naked eye
7.
equigranular
Answer: primary minerals are similar sized
8.
seriate
Answer: range of grain sizes for primary minerals
9.
hiatial;
Answer: bi-modial distribution of grain sizes of most primary minerals
10.
porphyritic;
Answer: two distinct grain sizes for primary minerals
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