This mutation covers the Boucles’ white markings in a Marble texture! Caillou does not affect pale modifiers such as grey and roan.

Acceptable colours range between white-offwhite, cream, grey and dark grey. Black marble is possible with the addition of the Ashen gene.

Average marble veining is acceptable with hints of another hue, but opaque black, gold-veined or other vivid colours must be achieved by combining other mutations such as Gémifier, Ashen, D’or, Briller, Ombre, etc. 

Extended Caillou can be any stone type!

Mutation Type: White-Affecting

Extends: Yes

Combines With: Gémifier (gemstone rifts), Ashen (dark marble), D’or (metal rifts), Briller (glittery rifts), Ombre (marble fading to another colour)

2D or 3D: 2D

Importable: Yes [Rarity: 1-2]

First Released: in October 2022, contributed by RL-EquestrianArts


Genotype(s) and Combination Genotypes are importable, Carrier Genotypes are not importable.

Carrier genotypes are not visible on the Boucle


nCa or CaCa

Combination Genotypes:

CaCag = Caillou and Gémifier combo

Example Gallery

Extended Info


Can be any type of stone.