Bone Block

The Bone Block was added to Minecraft as part of The Frostburn Update.

Source & About

Bone blocks can be found buried underground, clustered in patterns that combine to make a fossil structure. Bone blocks can be found in groups of 15 to 24 blocks (random). At y-coordinates ranging from 40 to 49, below the surface in deserts and swamplands biome, including the "Hills" and "M" variants. Each chunk has a 1 in 64 chance to generate a fossil. They may generate as one of four different variants of skull or one of four different variants of spine. Alternatively, bone blocks can be crafted using 9 bone meal (see below).

Crafting

Bone Block (x1)				Bone Meal x9 (Shapeless recipe)
Bone Meal	Bone Meal	Bone Meal		None	None	None
Bone Meal	Bone Meal	Bone Meal		None	Bone Block	None
Bone Meal	Bone Meal	Bone Meal		None	None	None

Trivia

• In snapshot 16w20a, bone blocks were actually transparent; however, this was fixed in snapshot 16w21a.
• As of update 1.12 (snapshot 17w17a), when a note block is placed on top of a bone block, it will make a xylophone sound.
• Due to the existence of fossil structures, there might be mobs about them in the future.

Blocks
Natural	Air • Stone • Granite • Andesite • Diorite • Bedrock • Clay( Terracotta) • Cobblestone ( Moss) • Cobweb • Dirt • Gravel • Coarse Dirt • Bone • Ice • Monster Spawner • Sand ( Red) • Sandstone ( Red) • Obsidian • Snow • Sponge • Wet Sponge • Stone Brick ( Cracked • Moss • Chiseled) • Prismarine ( Dark • Brick) • Sea Lantern • Pumpkin • Bee Nest • Snowier Snow
Manufactured	Bookshelf • Brick • Wool ( Carpet) • Concrete( Powder) • Conduit • Dried Kelp Block • Fence • Glass ( Pane) • Stained Glass ( Pane) • Glazed Terracotta • Hay Bale • Iron Bars • Jack o' Lantern • Ladder • Painting • Scaffolding • Slab • Smooth Stone • Cut Sandstone • Smooth Quartz • Smooth Red Sandstone • Slime • Snow • Stairs • Walls • Wood Planks • Beehive • Honey Block • Honeycomb Block
Ore	Coal Ore • Diamond Ore • Emerald Ore • Gold Ore • Iron Ore • Lapis Lazuli Ore • Redstone Ore • Nether Quartz Ore • Ancient Debris
Mineral Blocks	Block of Diamond • Block of Emerald • Block of Gold • Block of Iron • Lapis Lazuli Block • Block of Quartz • Block of Redstone • Block of Coal • Block of Netherite
Utility	Bed • Brewing Stand • Cake • Cauldron • Chest • Shulker Box • Crafting Table • Enchantment Table • Furnace • Jukebox • TNT • Anvil • Blast Furnace • Barrel • Bell • Campfire • Cartography Table • Composter • Fletching Table • Grindstone • Lantern • Lectern • Loom • Smithing Table • Smoker • Stonecutter
Mechanisms	Button • Dispenser • Redstone Lamp • Door • Fence Gate • Lever • Note • Piston ( Sticky) • Pressure Plate • Rail ( Powered • Detector • Activator) • Redstone ( Wire • Torch • Repeater • Comparator) • Trapdoor ( Iron Trapdoor) • Trapped Chest • Hopper • Dropper • Daylight Detector • Tripwire Hook • Observer
Plants	Cactus • Dead Bush • Chorus Plant • Flowers • Grass( Grass • Fern) • Leaves • Lily Pad • Melon • Mushrooms( Huge)  • Mycelium • Podzol • Nylium • Pumpkin • Saplings • Sugar Cane • Vines • Cocoa Pods • Wheat • Log • Corals • Kelp • Sweet Berry Bush • Nether Roots • Fungi • Weeping Vines
Liquids	Lava • Water
Non-Solid	Fire ( Soul Fire) • Sign • Torch ( Soul Fire) • Banner
The Nether	Glowstone • Shroomlight • Netherrack • Nylium • Nether Brick ( Fence) • Nether Quartz • Ancient Debris • Nether Wart • Nether Roots • Weeping Vines • Fungi • Soul Sand • Soul Soil • Basalt • Magma Block
The End	Dragon Egg • End Stone • Purpur( Purpur Pillar) • Endstone Brick • End Rod • Dragon Head • Ender Crystal
Creative only	Barrier • Structure Block • Jigsaw
Bedrock Edition only	Stonecutter (old) • Nether Reactor • Light Block
Technical	Piston Arm • Block 36 • Burning Furnace • Glowing Redstone Ore • Off-state Redstone Torch • Active Redstone Repeater • Flowing Water • Flowing Lava • Farmland • Pumpkin Stem • Melon Stem • Block 97 • Portal • End Portal Frame • End Portal
Unused	Locked Chest
Removed	Gear • Dirt Slab • Cyan Flower • Camera(BE)
Unimplemented	Crying Obsidian
Education Edition only	Element Constructor • Compound Creator • Hardened Glass • Border • Underwater TNT