Dust Trinkets were introduced on 27th oct a way to get more Dust due Player Suggestions.
Dust cap
Dust capsule

They can be obtained through:

1) Redeeming TORCH Codes

2) Participating in Guild Warfare and Brawls 10% chance to drop

Unlike Trinkets, they hold no value gear-wise or stat-wise, but can be reclaimed for dust.

The Dust value of each rarity of Dust Trinkets are as follows:

Sprinkle of Dust-

Normal: 2

Lump of Dust:-

Rare: 10 

Pile of Dust:-

High rare: 15 

Mound of Dust-

Super rare: 25

Mountain of Dust:-

Epic rare: 40