Native name: Γυαλί

Pumice mining on Gyali
Coordinates 36°39′43″N 27°06′54″E / 36.662°N 27.115°E / 36.662; 27.115Coordinates: 36°39′43″N 27°06′54″E / 36.662°N 27.115°E / 36.662; 27.115
Archipelago Dodecanese
Highest elevation 180 m (590 ft)
Highest point Volcano
Region South Aegean
Regional unit Kos
Capital city Chora
Population 10 (2001)
Postal code 853 03
Area code(s) 22420
Vehicle registration ΚΧ, ΡΟ, ΡΚ

Gyali (Greek: Γυαλί "glass", also spelled Giali or Yali, pronounced [ʝaˈli]) is a volcanic Greek island in the Dodecanese, located halfway between the south coast of Kos (Kardamaina) and Nisyros. It consists of rhyolitic obsidian lava domes and pumice deposits (which are mined in huge quantities).[1] The island has two distinct segments, with the northeastern part almost entirely made of obsidian and the southwestern part of pumice. These are connected by a narrow isthmus and beach made of modern reef sediments.


From right top counterclockwise: Stroggyli, Gyali, Pergoússa, Paheià and Nisyros.

The island is 6 km (4 mi) long and between 4 km (2 mi) and 500 m (1,640 ft) across. It has a 180 m (591 ft) cave. Parts of the island undergoing pumice strip mining are barren of vegetation. The 2001 census reported a resident population of 10 people. Administratively, it is part of the municipality of Nisyros. Its also popular for Perli, a thermo powder added in construction.

See also


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