Board Thread:Questions and Answers/@comment-184.6.12.115-20130116043941/@comment-5112555-20130722063201

yes, they mine it, but a quarry mining a block acts as if a player with a non-enchanted pickaxe/shovel/axe/shears mines it (see this topic ). so, if a quarry mines ice, it doesn't retrieve it because if a player mines ice it doesn't retrieve it