[2991] The diamond, as known to us, is octahedral.
[2992] Though found in comparative abundance in India, the diamond is not found in Arabia.
[2993] This is not the case with the diamond; for on being struck under such circumstances, it will break.
[2994] In reality, the diamond will burn, and, at a temperature of 14° Wedgewood, is wholly consumed, producing carbonic acid gas.
[2995] See Note [2988], above.
[2996] “Millet-seed.”
[2997] Ajasson says, that no doubt this adamas was Adamantine, or limpid Corundum.
[2998] Ajasson suggests that this may have been Dichroite, or Cordierite, known also as Iolite, or Water sapphire.
[2999] Possibly the Siderite, sparry iron, or spathic iron of modern Mineralogy. Ajasson is inclined to think that it is Corundum, of a dark hue.
[3000] See B. xx. c. 1, B. xxviii. cc. 23, 41, and B. xxxii. c. [12].