NILAH ~ Adjustable ring in natural AQUAMARINE Material: Rhodium-plated silver plated brass Ring size: adjustable Stone size: 8x10 mm EN: ACQUAMARINE - ENG: AQUAMARINE Curiosity: Aquamarine is a silicate, it forms in pegmatitic rocks, in metamorphic rocks and in the form of a mineral deposit in river sediments, but only if in the cooling phase the magma is sufficiently rich in beryl. The characteristic green/blue color is determined by the presence of traces of iron and the range of shades ranges from the transparent of the water to the most intense blue. It belongs to the cyclosilicate mineral class Chemical Formula: Be3Al (Si6O18) + K, Li, Na + (Fe) There are different varieties of aquamarine based on the more or less intense blue color and the possible presence of green shades.