Gold dust

Japanese: 砂金 - さきん

Gold exists as placer ore. It is found in the gravel of riverbeds and beaches as small pieces, but sometimes large nuggets are found. The purity is usually over 800/1000. It coexists with magnetite, ilmenite, quartz, monazite, zircon, etc. On a small scale, it is separated from the gravel by a cat-floating method, and on a large scale, it is collected by gold mining boats and separated by specific gravity. In Japan, it is found in the Sorachi River and Teshio River in Hokkaido.
→ Related topics Gold | Gold mines | Placer deposits | Gold mines

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

砂鉱として存在する金。河床や海浜の砂礫(されき)中に細片で散在するが，ときには大型の塊金が出ることもある。純度は通常800/1000以上。磁鉄鉱，チタン鉄鉱，石英，モナズ石，ジルコンなどと共存する。小規模にはねこ流しで砂礫と分離，大規模には採金船で採取，比重選鉱を行う。日本では北海道の空知川，天塩川などに産する。
→関連項目金｜金鉱｜砂鉱床｜山金

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