黄鉄鉱[outekkou] iron pyrites
金鉱地[kinkouchi] gold field
原鉱[genkou] (raw) ore
鉱化[kouka] mineralize
鉱業[kougyou] mining industry

鉱山[kouzan] mine (ore)
鉱山技師[kouzangishi] mining engineer
鉱山業[kouzangyou] mining industry
鉱質[koushitsu] mineral
鉱床[koushou] ore deposit

一閃[issen] flash
閃かす[hiramekasu] to brandish
閃き[hirameki] flair
閃く[hirameku] to flash (lightning, etc.)
閃光[senkou] flash

閃光電球[senkoudenkyuu] flash bulb
花崗閃緑岩[kakousenryokugan] granodiorite
紫電一閃[shidenissen] flash of lightning
電光一閃[denkouissen] flash of lightning
閃緑岩[senryokugan] diorite (a type of rock similar to granite)