Originality Diamonds used to be viewed as a symbol of romantic gestures and long- lasting love. But things have changed now. The preferred gemstone for engagement rings has changed recently. Nowadays, people are less concerned with sticking to an old fashioned style but more interested in being unique and purchasing a stone that expresses their individual taste. Although a relatively new gem, tanzanite is poised to dominate the market for engagement rings, choosing a tanzanite engagement ring is the ideal way to express to your significant other how special your love is because of its colour, sparkle, and classic design. Colour Trichroic tanzanite is renowned for its beauty. This gemstone on an engagement ring makes a magnificent design statement, with a royal blue colour with little tints of lavender and burgundy red.