Grande Conque Beach — Cap d'Agde
Black basalt sand · Unique in France · 21 m cliffs
Grande Conque is a true rarity on the French Mediterranean coast: its sand is black, made of volcanic basalt from Mont Saint-Loup. Crescent-shaped at the foot of 21 m cliffs, it offers an open panorama over Cap d'Agde and the Mediterranean. A visually stunning beach, very different from the usual golden sand.
Why is the sand black?
740,000 years ago, the Mont Saint-Loup volcano poured its lava flows down to the sea. This basalt — dark, dense volcanic rock — was eroded by waves over millennia, producing the dark grains that carpet Grande Conque. The same basalt gave Agde its black colour and the nickname "Black Pearl of the Mediterranean".
Features and access
Sand type
Black volcanic basalt
Shape
Crescent between cliffs
Cliff height
21 metres
Location
Cap d'Agde, southern end
Swimming
Supervised in season
Unique feature
Only on French Mediterranean
Frequently asked questions
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