1. Vocabulary Chapter 2: Lesson 1
Mineral
Inorganic
Crystal
Streak
Luster
Mohs Hardness Scale
Cleavage
Fracture
geode
Crystallization
Solution
vein

2. Mineral
A naturally occurring solid that can form by inorganic processes with a crystal structure and a definite chemical composition (chemical formula)
Not a rock: Rocks are made of minerals.
Ex. Quartz, gold, diamond,

3. Inorganic Not formed from a living organism A: Organic
Ex. Quartz is formed from magma

4. Crystal Repeating pattern of mineral particles
Ex. Flat sides called faces and sharp edges or corner.

5. Streak Color of a mineral’s powder Ex. Color and streak can differ
Pyrite: gold color: black or gray streak

6. Luster How light is reflected on a minerals surface
Ex. Metalic, glassy, pearly, earthy, waxy, silky, greasy

7. Mohs Hardness Scale
A scale to help identify minerals based on how hard they are.
Ex. Fingernail, steel knife, diamond, nail,

8. Cleavage
Splitting along flat surfaces based on how atoms are arranged.
Ex. Mica remains the same shape

9. Fracture A mineral breaking in an irregular shape
Ex. Not the same shape; quartz

10. geode
A round hollow rock that is lined inside with crystals.

11. crystallization
A process that arranges atoms in a particular pattern which forms a crystal structure

12. solution
A mixture in which one substance is dissolved in another

13. vein
A narrow channel or slab of a mineral that is different than the rock around it