Dvoynoy (double) geyser is one of the 5 largest geysers on the Vitrazh. The vent opening is made of two parallel cracks, located on the slope one under another. Boiling water erupts from the upper crack each 20—40 sec at 0.5—1 meter, and from the lower crack — each 85—115 sec at 1—3 meters.
Geyserite structure above the upper vent hole is sometimes referred to as Sedlo (saddle), the one above lower vent hole referred to as Stremya (stirrup). These are, however the two vents of the same geyser.
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