English Dictionary

carbonado

IPA（発音記号）

/ˌkɑːbəˈneɪdəʊ/

名詞

(mineralogy) A dark, non-transparent, impure form of polycrystalline diamond (also containing graphite and amorphous carbon) used in drilling.

日本語の意味

鉱物学における、黒く不透明で不純な多結晶ダイヤモンド（グラファイトや非晶質炭素を含む）で、掘削に用いられるもの

The drill bit's tip was coated with carbonado to improve performance in hard rock drilling.

硬い岩石の掘削で性能を高めるために、ドリルビットの先端は黒色多結晶ダイヤモンドで被覆されていた。

意味（1）

(mineralogy) A dark, non-transparent, impure form of polycrystalline diamond (also containing graphite and amorphous carbon) used in drilling.

At present, equal attention is paid to irregular fragments of a blackish or greyish colour, occasionally of considerable size, also yielded by the washings of diamandiferous sand, which formerly passed unregarded. These fragments are now carefully colected, and have acquired some considerable value in commerce, where they are known under the name of carbonado or carbon. […] An examination of these numerous varieties has made it evident that between carbonado of a simply micro-crystalline texture, and the diamond regularly crystallised in diaphanous octahedrons, there exists an uninterrupted series of intermediate conditions.

carbonados （ plural ）

carbonadoes （ plural ）