London blue topaz is a stunning gemstone known for its deep, rich blue color, which can range from a dark, almost navy blue to a more vibrant, electric blue. This variety of topaz is a treated form of the mineral, and its color is achieved through a combination of heat and irradiation processes.

The gemstone is highly valued for its clarity and brilliance, making it a popular choice in fine jewelry. London blue topaz is often used in a variety of settings, including rings, earrings, and pendants, where its striking color can be showcased.

In terms of hardness, London blue topaz scores 8 on the Mohs scale, which makes it quite durable and suitable for everyday wear. It is also associated with various metaphysical properties, such as promoting communication, self-expression, and emotional balance.

If you have any more questions about London blue topaz or any other gemstones, feel free to ask!