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Originally Posted by T. Koch
...Normally you would see a straight line of dots appearing in an ivory piece that has been cut from lengthwise down along the left and right borders of the TIZ.
If hippo tusks indeed grow throughout the life of the animal, my guess is that your piece came from an old hippo where the continuous addition of the lamellar dentine layers over time has completely "crushed" the TIZ and reduced it to the series of dots we see from the pommel end. Notice how the angle of dots in your hilt approximately fits with the shape of the TIZ? The picture also clearly shows the laminations.
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Well Thor I think that when you compared the TIZ pix with the badik's hilt, definitely you've got it right.
However some of my kerises hilts were also producing the similar tiny dots over the TIz. Then would it be a hippo tusks as well? Generally it was touted as "sea ivory" over here, and the main indicator is the tiny dots along the TIZ, if that was ever the TIZ.
Was marine ivory (walrus, sperm whale etc) doesn't have TIZ?