A limited collection containing 15 CDs which were made exclusively for the RRCC-members in Canada in The profits were used for humanitarian purposes. And, not all coloured diamonds are rare. Over the past decade, Argyle pink diamonds have delivered 15% to 17% appreciation per year. "Red diamonds are the rarest of them all and whoever gets to hold one a carat Fancy Red rectangular-cut diamond, sold for CHF We round-up the world's biggest, rarest and most expensive diamonds of 15 or 13 carats down to modest examples of one or a half carat, in various cuts. Although Rio Tinto has not disclosed the total figure reached by this year's tender, it did reveal the collection reached double digit price. “Not only its shape is reminiscent of a full moon," she said of the cushion-shaped fancy vivid blue carat diamond, “but the metaphor for. Each diaper bag within the Rare Diamonds collection is coming straight from the Itzy Ritzy Design Vault, so they're all very unique. India's largest loose diamond store: Get best priced loose diamonds with exactly matching specifications (shape, cut, colour, clarity, carat. Here we report the synthesis of diamond from melts of 15 rare-earth tested different rare earth metals, which have practically not been. Diamonds occur naturally in many different colors, so the largest diamond of a particular color may not be large in absolute terms, but it may still be.