安特罗山
Colorado, USA
美国科罗拉多州的安特罗山是北美海拔最高的宝石产地之一,以海蓝宝石与稀有的矽铍石闻名。
What it is known for
Miarolitic cavities in the Mount Antero granite yield blue aquamarine, phenakite, fluorite, and smoky quartz at high altitude.
What collectors look for
Gem aquamarine and the rarer phenakite, well-terminated on matrix, are the most sought-after.