Flashcards in Physical Properties Deck (14):
What are some of the physical properties of a diamond?
Hardness, Toughness, Brittle, Repels Water, Thermal Conductivity, and Cleavage,
Gemstone combination of hardness, toughness, and stability.
Hardness is the ability of a material to resist abrasion when a pointed fragment of another substance is drawn across it without sufficient pressure to develop fracture or cleavage.
Resistance to impact (diamonds are brittle).
Black Diamonds are tough as well as hard.
Crystals have different bond strengths directions, so hardness varies with direction.
When a mineral sample is split in a direction which does not serve as a plane of perfect or distinct cleavage. A mineral fractures when it is broken or crushed. It is the breaking that occurs in largely random directions in both crystalline and non-crystalline materials.
Ability of a material to resist physical or chemical alteration due to light, heat or chemical attack.
Directional breakage, along particular planes of atomic bonding in a crystalline material. It is a weakness in particular directional plane of the crystal cause of the atomic bonding.
Cleavage can only occur in crystalline material and cannot occur in amorous material such as glass.
Can occur in any gem material, whether crystalline or not. Crystalline gems can be fractured in directions across a cleavage direction.
Concentric breaks similar to ridges in a seashell.
One of the best conductors of heat