Brush item in Minecraft
The Brush is the archaeology tool: brushing Suspicious Sand or Suspicious Gravel slowly reveals the item buried inside. It also lets you collect scutes from armadillos.
It is made with the Crafting Table from Copper Ingot, Stick and Feather.
What it does
Hold the use button on a suspicious block and keep brushing until the item pops out; the block is then plain sand or gravel again. If you stop halfway, the item slowly sinks back. Breaking the block instead destroys the find.
Suspicious blocks are found in desert pyramids, desert wells, ocean ruins and Trail Ruins, and they hide pottery sherds, armor trims and other relics.
Brushing an Armadillo makes it drop an Armadillo Scute, used to craft Wolf Armor. This costs much more durability than brushing a block.
How to craft
Crafting table 
Feather + Copper Ingot + Stick → Brush
// Slots with several items cycle through every accepted option.
How Brush connects
4 links · from the 26.3 game dataEnchantments for it
Advancements
Isn't It Scute?Get Armadillo Scutes from an Armadillo using a BrushBrush · FAQ
How do you get Brush in Minecraft?
At the Crafting Table: 1 × Copper Ingot, 1 × Stick and 1 × Feather give 1 × Brush.
What is Brush used for in Minecraft?
It digs items out of Suspicious Sand and Suspicious Gravel and collects scutes from armadillos.
How much durability does Brush have?
64 durability points: each use removes one, and it breaks when none are left. Mending and Unbreaking can extend it.
Does Brush stack?
No: only one per inventory slot.
Which enchantments can you put on Brush?
3 enchantments: Mending, Unbreaking and Curse of Vanishing.
Which advancements involve Brush?
Isn't It Scute? (Get Armadillo Scutes from an Armadillo using a Brush).