Crystal Mine

A sparkling and glowing crystal mine (we don't know how it sparkles or glows.) This mine costs 3.5k and produces 8$ of Crystal every 3 seconds. It is unknown what it is made of, but it appears to have triboluminescence happening to it (with no end) since it glows and sparkles. But that won't matter, as it's pink and transparent and only takes up 2 x 3 on the grid.