Dover: Annual Weather Averages. August is the hottest month in Dover with an average temperature of 17Â°C (62Â°F) and the coldest is February at 4Â°C (38Â°F) with the most daily sunshine hours at 8 in August. Average Temperature: Dover. Loading weather data.
Satellite Island, wilderness surrounds. In the heart of the magnificent D'Entrecasteaux Channel, in the south of Tasmania, lies a small island of immense beauty.
Helenite, also known as Mount St. Helens obsidian, emerald obsidianite, and ruby obsidianite, is a synthetic gemstone made from the fused volcanic rock dust from Mount St. Helens.s word of the discovery spread, jewelry companies took note and began to find ways to reproduce the helenite. Helenite is made by heating rock dust and particles from the Mount St. Helens area in a furnace to a temperature of approximately 2,700 Â°F (1,480 Â°C).