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Thames and Kosmos 656041 Grow a Green Crystal
Original price
$8.99
-
Original price
$8.99
Original price
$8.99
$8.99
-
$8.99
Current price
$8.99
Grow sparkling, blue crystals overnight from a safe solution of potassium aluminum sulfate. Single out the largest crystal shard, redissolve the remaining crystals, and repeat the crystal formation process to grow a larger, more striking...
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