Stilbite, Laumontite, Thomsonite, Okenite, Tobermorite,
The Storr, Portree,
Trotternish, Isle of Skye, North West Highlands (Inverness-shire),
is a fairly common mineral but rarely found as a faceted
gem. It often forms as nodular aggregates that can appear
glassy, dull or even fibrous. Gyrolite usually forms
individual round nodules as opposed to botryoidal or
crustal growths. Many Gyrolite nodules form inside of
volcanic bubbles called vesicles that create surreal
landscapes of various minerals.
is found at numerous localities worldwide. At Portree,
Isle of Skye and 'S Airde Beinn, Isle of Mull, Scotland.
From Ballhenry, Co. Antrim, Ireland. At Ortano, Elba,
and at Monte Biaena, Pannone, Trentino-Alto Adige, Italy.
At Ljósá, Eysturoy, and Gjónoyri, Streymoy, Faeroe Islands.
From Qarusait and Tapaursak, Greenland. In India, from
Nasik, Poona, on Bombay Island and around Bombay, Maharashtra.
In Japan, at Sawayama Lake, Nagano Prefecture; Irakawa,
Yamagata Prefecture; and Otemo, Niigata Prefecture.
In the USA, from Fort Point, San Francisco County, and
in the New Almaden mine, Santa Clara County, California;
from Yellowstone National Park, Wyoming; in the Goose
Creek quarry, Leesburg, Loudoun County, Virginia. From
40 km southwest of Cape Blomiden, between Margaretville
and Port George, Nova Scotia, Canada. A few other localities