Statues

Statues can be found in caves underground. They require a hammer or pickaxe made of mithril or better to be mined, as of 2.4.8
Most statues represent a mob found in the game, and one of them (Crosshair Statue) is based on Jack. They can be found on the same planet as the mob it is based on, though some may spawn in different planets (e.g. Grumpy statutes spawning on Seth). All mob-based statues appear to have the same bases, while those of statues not based on mobs will be completely unique.

Tip: Look for statues in pools of liquids, especially acid, as they appear to spawn more commonly in these.

There are currently at least 59 statues total.

Statue Name	Inventory Icon	Look When Placed	Based on Mob?
Anther		File:B Anther Statue.png	Yes
Belly Bob			Yes
Blind Skeleton	File:I Blind Skeleton Statue.png		Yes
Bronze Knight			Yes-ish (Skeleton Knights)
Brute Ogre	File:I Brute Ogre Statue.png	File:B Brute Ogre Statue.png	Yes
Crawler Tall			Yes
Crocodile Frost			Yes
Crosshair			Yes ;)
Demon			Yes-ish (Obsidian Demon)
Demon Gator			Yes
Demon, Obsidian		File:B Demon Obsidian Statue.png	Yes
Demon Ripper	File:I Demon Ripper Statue.png		Yes
Falcon			No
Gargoyle			No
Gnawler			Yes
Gorilla Ripper			Yes
Grumpy			Yes
Hollow Demon			Yes
Ice Yeti			Yes
Jungle Scarab	File:I Jungle Scarab Statue.png		Yes
Kaleb			Yes
King Rat	File:I King Rat Statue.png		Yes
King Slime		File:B King Slime Statue.png	Yes
Krake			Yes
Krake Worm		File:B Krake Worm Statue.png	Yes
Leaper			Yes
Lume Gator		File:B Lume Gator Statue.png	Yes
Mage Skeleton	File:I Mage Skeleton Statue.png		Yes
Mammoth, Huge			Yes
Melting Skeleton		File:B Melting Skeleton Statue.png	Yes
Minotaur	File:I Minotaur Statue.png		No
Mummy, Spear	File:I Mummy Spear Statue.png		Yes
Mummy			Yes
Murk			Yes
Pentalober			Yes
Putrid King	File:I Putrid King Statue.png		Yes
Scorpion	File:I Scorpion Statue.png		Yes
Spore Screamer		File:B Spore Screamer Statue.png	Yes
Shadow Lurker, Cold			Yes
Shadow Lurker	File:I Shadow Lurker Statue.png		Yes
Skeleton, Ivory			Yes
Skeleton Knight, Gold		File:B Skeleton Knight Gold Statue.png	Yes
Skeleton Mage, Frost			Yes
Skeleton	File:I Skeleton Statue.png	File:B Skeleton Statue.png	Yes
Skexoton		File:B Skexoton Statue.png	Yes
Slime, Evolved			Yes
Slimy Eye		File:B Slimy Eye Statue.png	Yes
Slutch			Yes
Snake			No-ish (Worm)
Spider			Yes
Spore Knight Statue			Yes (Exotis Knight)
Spore Zombie Statue			Yes
Swamp Skull		File:B Swamp Skull Statue.png	Yes
Templar		File:B Templar Statue.png	No
Tribal Demon			Yes
Tribal Ripper			Yes
Turkey			Yes
Zombie, Ghost			Yes
Zombie			Yes