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Chalk

Q: Is Chalk natural or synthetic?

. Extraction: Not a natural extract. Chalk (calcium carbonate) is nearly odorless. The chalk accord is composed from dry-mineral synthetics, powdery materials, and clean-dry modifiers..

NATURAL AND SYNTHETIC, POPULAR AND WEIRD / fresh · powdery · metallic

Chalk

Category	NATURAL AND SYNTHETIC, POPULAR AND WEIRD
Subcategory	fresh · powdery · metallic
Origin
Volatility	Heart Note
Botanical	N/A — mineral (calcium carbonate)
Appearance	Soft, white, fine-grained sedimentary mineral; dry, powdery texture with a faint earthy-mineral scent
Odor Strength	Medium
Producing Countries	Asia, Europe, North America
Pyramid	Heart

Dry, mineral, dusty. Calcium carbonate against slate — the classroom smell of chalk dust, alkaline and slightly sweet, with zero moisture.

Scent
The Full Story
Fun Fact
Extraction & Chemistry
In Perfumery

Scent

Dry, mineral, alkaline, with a faint dusty sweetness. Less earthy than clay, less cold than stone, with a specific powdery dryness that absorbs moisture. The alkaline quality is gentle, not acrid. The overall impression is of absolute dryness — a material that repels water.

Evolution over time

Immediately

Dry mineral dust, faintly alkaline

After a few hours

Subtle powdery dryness, neutral

After a few days

Nearly imperceptible — dryness itself

The Full Story

Chalk as a fragrance note refers to the smell of calcium carbonate (CaCO3) in its compressed, dusty form — blackboard chalk, chalk cliffs, limestone dust. Pure calcium carbonate is essentially odorless, but chalk dust carries volatile compounds from its manufacturing process and from contact with surfaces (slate, skin oils).

The perceived smell of chalk is dry, mineral, alkaline, and faintly sweet. The sweetness may come from trace amounts of calcium oxide (quicklime) or from the human brain associating dryness with a particular kind of sweetness. The dust aspect is crucial — chalk does not smell unless it is powdered and airborne.

In perfumery, chalk is a mineral-textural note evoking classrooms, geology, and dryness. It belongs to the contemporary vocabulary of mineral and earth notes alongside clay, slate, and concrete.

This note in Première Peau. Nuit Elastique · Albâtre Sépia. Sample all seven extraits in the Discovery Set.

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Related: Alder · Alpha Humulene · Amaranth · Amberever · Ambramone · Amburana Bark · Antillone · Apple Tree

Did You Know?

Did you know?

Natural chalk is made of microscopic shells of coccolithophores — single-celled marine algae that lived millions of years ago. The White Cliffs of Dover are made entirely of these tiny fossils, compressed over 70 million years. Each cubic centimeter contains billions of individual shells.

Extraction & Chemistry

Extraction method: Not a natural extract. Chalk (calcium carbonate) is nearly odorless. The chalk accord is composed from dry-mineral synthetics, powdery materials, and clean-dry modifiers.

Molecular Formula	CaCO₃
CAS Number	13397-25-6
Botanical Name	N/A — mineral (calcium carbonate)
IFRA Status	No known restrictions
Synonyms	Calcium carbonate · Limestone · Whiting
Physical Properties
Odor Strength	Medium
Appearance	Soft, white, fine-grained sedimentary mineral; dry, powdery texture with a faint earthy-mineral scent

In Perfumery

Chalk is a conceptual mineral note used in dry, abstract, and classroom-nostalgic compositions. Built from dry-mineral synthetics, powdery-clean materials, and alkaline-dry modifiers. Functions as a textural modifier providing dryness and mineral character. Pairs with iris (both are dry and powdery), clean musks, and mineral-earthy notes.