|Native name: Γυαλί|
Pumice mining on Gyali
|Highest elevation||180 m (590 ft)|
|Postal code||853 03|
|"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). 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.
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.
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