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Minerals

Introduction to Minerals

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MORE DECKS TO EXPLORE

PRESENTATION OUTLINE

1.

Minerals

Properties and formation
Photo by cobalt123
2.

Definition

  • Naturally occuring
  • Inorganic(not living or made from living things)
  • Solid
  • Definite chemical composition
  • Crystalline structure
Inorganic (not living or made from living things)
Definite chemical composition (certain elements in definite proportions ex. Pyrite made from 1 iron atom and 2 sulfur FeS2)
Crystalline structure (an orderly, internal, repeating arrangement of atoms)
Photo by N@ncyN@nce
3.

Over 2000 known varieties. Most are very rare. Around 200 are more common.

Photo by Kotomi_
4.

HOW TO IDENTIFY MINERALS?

  • Color
  • Streak
  • Luster
  • Hardeness
  • Crystal shape
  • Cleavage
  • Magnatism
  • Florescence
Photo by Auntie P
5.

COLOR

MOST OBVIOUS, BUT MISLEADING
Photo by Claudio.Ar
6.

DIFFERENT COLORS MAY RESULT FROM

IMPURITIES. EXAMPLE = QUARTZ
Impurities are elements that occur in low concentrations in minerals
Photo by MAURO CATEB
7.

STREAK

COLOR OF MINERAL IN POWDER FORM
Obtained by scratching a mineral on a piece of unglazed porcelain.

Example: Hematite on left & Sulfur on right
8.

Luster

light reflecting
9.

TWO MAJOR TYPES

10.

hardness

scratchability
11.

fracture and clevage

12.

calcium carbonate

fizzes with an acid
Photo by Black Country Museums

Julie Samuel