9 carat yellow gold blue topaz and diamond ring a beautiful blue topaz and diamond ring the sky blue colour of the hand cut topaz is perfectly complimented with two cut diamonds set on a 9ct yellow gold ring band this is a perfect jewellery gift or a treat for yourselfa diamond is the birthstone for the month of april zodiac stone for aries 21st march 20th april given as the 10th 60th and 75th wedding anniversary stone blue topaz information birthstone november zodiac sagittarius