Scratch hardness

Scratch hardness

Section Title:
Table Section Text: None

Material	Mohs' scale	Ridgway's scale	Wooddell's scale

talc	1	1

gypsum	2	2

calcite	3	3

fluorite	4	4

apatite	5	5

orthoclase	6	6

vitreous silica	7

quartz	7	8	7

topaz	8	9

garnet	8.92	10

corundum	9	9

fused zirconia	11

fused alumina	9.03–9.065	12	10

tungsten carbide	9.09	12.0

silicon carbide	9.13–9.17	13	14.0

boron carbide	9.32	14	19.7

diamond	carbonado	9.82	15	36.4

ballas	9.99	42.0

bort	10	42.4

Sentence(s)

The Wooddell's scale had seven for quartz, nine for corundum and 42.4 for diamond bort.
Wooddell's scale value is seven for quartz and nine for corundum, and 42.4 for diamond bort.

final_sentence: The Wooddell's scale had seven for quartz, nine for corundum and 42.4 for diamond bort.
final_sentence: Wooddell's scale value is seven for quartz and nine for corundum, and 42.4 for diamond bort.