diamond appraisal

Toughness - resistance to breaking, chipping,

or cracking.

 

*Diamond has directional hardness not toughness,

 

-HARDNESS-exceptional

-TOUGHNESS-good

 

Stability - resistance to chemical breakdown. Or color change due to variation in temperature.

 

 

Ultrasonic- Diamond no reaction

Acid- Diamond no reaction

Alcohol- Diamond no reaction

 

Ultrasonic- Pearl bubbles <attacked>

Acid- Pearl Attacked

Alcohol- Pearl in time will attack

 

*Diamond only mineral with covalent bonding

 

Fun TIP: Diamond in 850 degrees celsius diamond burns in air only outside of diamond burns, a cloudy appearance of burntness.

 

HARDNESS, TOUGHNESS, & STABILITY ALL = <*DURABILITY*>

 

Physical property 

 

Diamond

chemical /carbon

chrystal/ cubic

Specific Gravity/ 3.52

Cleavage/4

Transparency/ very clear

Hardness/ 10

 

Graphite

chemical /carbon

chrystal/ hexagonal

Specific Gravity/ 1.20

Cleavage/1

Transparency/ Opaque (not see through)

Hardness/ 1.5