Sodalite crystals are tough but can scratch easily; they typically rank 5.5-6 on the Mohs hardness scale, making them softer than quartz (7-7.5) and topaz (8), but harder than fluorite (4) and ...

Sodalite forms in igneous rocks that crystallized from sodium-rich, silica-poor magmas. That’s how it got its name—soda + lithos, or “sodium stone," according to Rock Your World gem & art ...

Sodalite was first discovered in Greenland in 1811 but became popular after the gemstone was found in Ontario, Canada in 1891. The mineral is a deep blue color and visually looks similar to ...

Fluorescent sodalite syenite, also known as “Glowdalite” for its fluorescence, formed in Michigan about 1.1 billion years ago. It was during a particularly violent geological period when North ...

Princess Sodalite Mine is home to a host of rare, sparkling gemstones for you to discover just three hours away from Toronto in Bancroft, known as Canada's Mineral Capital. There is no better ...

WITH reference to the properties of Indian sodalite shown by Mr. T. H. Holland at the York meeting of the British Association (September 27, p. 550), will you permit me to point out that, although ...