Marble Block

The  is a block in Build A Boat For Treasure. It is among the strongest Blocks in the game. It can usually can be found in Rare to Legendary Chests, purchased in the Shop for 4,000 Gold from the Plane Blocks package (containing 100 Blocks and other items), or for 375 Gold (for 50 Blocks).

Its durability enables it to be used on outer parts of boats as a design while withstanding the impact of obstacles. It is also lightweight, requiring only half a Balloon to lift it, making it suitable for motor-controlled boats.

Trivia

 * It has a weight similar to other durable blocks, and requires 1 Balloon to lift two of them.
 * Its appearance is similar to that of the Obsidian Block, except that its colors are "flipped around".
 * It is now in the shop permanently as a package of 50 Marble Blocks costing 375 gold.