里科矿区
Colorado, USA
位于美国科罗拉多州多洛雷斯县圣胡安山脉的里科矿区,是自 1879 年开采的历史性银与贱金属矿区,其矿脉含条带状石英与菱锰矿,并伴生方铅矿与闪锌矿。
A San Juan silver district
The Rico district, in the Dolores River valley of south-western Colorado, has been mined since 1879 — first for silver, later for lead and zinc. Its veins are characterised by banded quartz and rhodochrosite with streaks of galena and sphalerite.
What collectors look for
Banded and crystallised rhodochrosite, together with galena and sphalerite, are the district's collector minerals.