Packed Ice

Packed ice is an opaque solid block variant of ice. Unlike regular ice, it does not melt under contact with the light sources.

Obtaining
Packed ice can be obtained using any tool enchanted with Silk Touch, though a pickaxe is the fastest. Without Silk Touch, breaking it drops nothing. Unlike normal ice, it does not turn into water when mined without Silk Touch.

Natural generation
Packed ice is found in the rare Ice Spikes biome. It also forms icebergs found in frozen oceans.

Packed ice generates as windows in igloos.

Packed ice generates in snowy tundra villages.

Trading
Wandering traders have $1/6$ chance to sell packed ice for 3 emeralds.

Crafting ingredient
Packed ice is slippery, causing most entities to slide, including items. This also allows for increased speed of items in water currents by placing the packed ice under the water current. Mobs do not travel faster in water currents on packed ice.

When a non-full block is placed on top of packed ice, the block has the same 'slipperiness' as the ice below it; although, if packed ice is placed below soul sand, it amplifies the slowing effect of the soul sand rather than making it slippery.

Boats can travel on packed ice with a top speed of 40 m/s. Ice tracks built from blue ice, packed ice, or a combination are useful for long-range travel in all three dimensions.

Mobs can spawn on packed ice. This can allow for compact mob farms that rely on the tendency of pushed mobs to slide off the ice in some way.

Packed ice is a completely solid block, and allows placement of any objects on top.

Unlike normal ice, packed ice does not melt if placed near light sources.

Packed ice is not a storage block, as it cannot be crafted back into ice.

Note block
Packed ice can be placed under note blocks to produce chime sounds.

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