Ash covered the marble diamond-patterned floor and floated in large pools of greywater from the fire hoses.

火山灰覆盖着大理石钻石图案的地板，还漂浮在消防水管的污水池里。

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Then he discovered a new Japanese method of cutting diamonds: When viewed under a low-magnification (3x) lens, the stone refracted light in such a way as to give off a pattern of eight heart-shaped sparkles at the bottom of the diamond and eight arrow-shaped fire-bursts through the top--hence the name "hearts-and-arrows" diamonds.

FORBES: Stones on fire