Red Diamonds - ~$ 2 million per carat Though all colored diamonds are incredibly rare, none are more so than the red diamond. Less than 20 exist today and most weigh less than half a carat, however there are three that weigh over 5 carats with the biggest being the Moussaieff Red (5.11 carats).
A STUNNING COLOURED DIAMOND AND DIAMOND RING, BY MOUSSAIEFF DESIGNED AS A FLOWERHEAD, SET WITH A HEART-SHAPED FANCY RED DIAMOND WEIGHING APPROXIMATELY 2.09 CARATS, WITHIN A PETAL SURROUND SET WITH SIX PEAR-SHAPED DIAMONDS WEIGHING APPROXIMATELY 1.07 TO 1.01 CARATS, ACCENTED BY BRILLIANT-CUT DIAMONDS, TO THE SIMILARLY-CUT DIAMOND THREE QUARTER-HOOP, MOUNTED IN 18K WHITE GOLD,
The-Moussaieff-Red-Diamond The price is $7,000,000.00. This astonishing gem is color red and has a definite size of 5.11 K or 1.022 grams. It has a cone shaped precisely cut that is appraised as striking red according to the intense observation and study of the American Gemological Institute. This gem is a little bit smaller compare to other highly valued diamond but according to the AGI, so far, it is the largest red diamond ever appraised.