Ruphus -> RE: Saddle bone - ivory or camel? (May 16 2014 8:55:46)
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quote:
ORIGINAL: Jeff Highland quote:
I stand corrected. Still, ivory ranks harder than bone. huh? diamond is 10 you say ivory is 2-3 and bone is 5, how does that make ivory harder You don´t want to understand. I said I stand corrected, so forget about the quoted numbers. Here are more accurate ones: Ivory: (effective hardness) ~ 5 for hippopotamus and narwhal ivory, which are slightly harder than elephant ivory; [2½ -<3 per Webster, 1948-1949] Bone: (effective hardness) 5; [2½ - Webster, 1948-1949] And with that I stand corrected on the relation of the materials as well. Obviously bone can be as hard as ivory, which I would had not thought. I used to think that dentin comes closer to enamel than bone, which must have been a mistake. Ruphus
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