Thecolourofstone:whereitcomesfrom.

Stone colour is not aesthetic. It is geological. Every tone in the KHADANE™ catalogue traces back to a specific chemical or mineral condition in the Vindhyan basin when the sediment was being deposited.

The iron family.

Iron in oxidised form (hematite, Fe₂O₃) produces the reds and browns. The deeper the iron concentration, the deeper the colour. Red Choco sits at the high-iron end. Autumn Brown is mid-range. Raj Blend mixes iron with organic carbonates for its brown-green character.

Iron in reduced form (magnetite, Fe₃O₄) produces darker, more neutral greys. Slate Grey shows this — a denser, more iron-rich grey than Kandla Grey, but with the iron held in a reduced state.

The carbonate family.

Where ancient algal mats lived in the shallow Vindhyan sea, they left behind organic carbonates. As these mixed into the sandstone matrix, they gave certain beds a distinctive green or olive cast. This is the Garda Green / Garda Green story. The colour comes from what was alive in the water a billion years ago.

The quartz neutrals.

Where iron was low and organic content was minimal, you get the neutrals — Kandla Grey, Buff, Camel Dust. These are quartz-dominated beds with minor clay minerals. They are the workhorses of the export catalogue precisely because they pair with almost any garden or interior palette.