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Black Obsidian
Obsidian forms from molten lava in the last stages of volcanic eruptions, the remaining silica minerals flow onto the surface and cool rapidly into glass before crystallization can occur. The colour of pure Obsidian is black, but there are other variations depending on inclusions of crystals where the lava cooled slower. The most common are mahogany, snowflake (white spots of crystobalite), rainbow and gold-sheen. There are also Apache Tears which are small rounded rough form
Jun 8, 20182 min read
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Sodalite
The composition of Sodalite is sodium aluminium silicate and it gets its name from the sodium content. Sodalite does not belong to a family of crystals like the quartz crystals we have already worked with, however in mineralogy it may be classed as a feldspathoid. Sodalite is found in all shades of blue and may contain white streaks of calcite within it. Sodalite is the main constituent of Lapis Lazuli, along with other minerals. Sodalite is usually associated with the third
Jun 1, 20182 min read
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Blue Lace Agate
Blue Lace Agate is a type of chalcedony that belongs to the Quartz family of minerals. Agate forms in cracks in rocks or hollows formed by gas bubbles in volcanic rocks. All agate is banded and the blue lace is particularly pretty as it forms pale blue and white lace effect bands. Its colour is due to copper and salt. Blue lace agate is a stone of calmness. It is peaceful and soothing and can help to cool anger. It is a good stone for children or shy, sensitive people as it i
May 25, 20182 min read
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