Black tourmaline core

Black tourmaline core
Released							26 October 2017 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							Yes
Equipable							No
Stackable							No
Noteable							Yes
Options							Inspect
Destroy							Drop
Examine							The blackened heart of the Grotesque Guardians.
Values
Value							41,500 coins
High alch							24,900 coins
Low alch							16,600 coins
Weight							1 kg
Grand Exchange
Exchange							2,799,943 coins (info)
Buy limit							5
Daily volume							67
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Advanced data
Item ID							21730

The black tourmaline core is an item dropped by the Grotesque Guardians that can be found on the Slayer Tower's rooftop. They can be used to upgrade the Bandos boots to create guardian boots. When a player selects the Inspect option on the core, a message in the chatbox will state Fallen from the centre of a Grotesque Guardian. This could be attached to a pair of Bandos boots...

When a player creates the guardian boots, a message in the chatbox will state The second you hold your tourmaline core by the Bandos boots, the core is absorbed rapidly. Perhaps there is some link between the metal in Bandos and tourmaline...

Products

Item		Members	Skills	XP	Materials
	Guardian boots		None	None	1 × Bandos boots 1 × Black tourmaline core

Item sources

For an exhaustive list of all known sources for this item, see here (include RDT).

Source	Level	Quantity	Rarity
Grotesque Guardians		1	2 × 1/1,000