If you love the blue-green hues of aquamarine or tourmaline but want a more durable gemstone, teal sapphire is the perfect choice. With a Mohs hardness of 9, it resists scratches and everyday wear far better than aquamarine (7.5) or tourmaline (7). Teal sapphires also offer greater brilliance, natural colour vibrancy, and ethical sourcing, making them a long-lasting, luxurious, and practical alternative for fine jewellery.