This gorgeous necklace features a dainty petal shape measuring 7mm x 6mm and pavé set diamonds totalling 0.08 carats. The chain measures 18in/46 cm and a sliding bead allows you to adjust its length. Team with Alma Stud Earrings for a subtle everyday look. Taking its name from the Spanish word for ‘soul’, Alma features perfectly flat, soft petal shapes for an effortlessly modern way to wear diamonds. Stone Diamond is the hardest known mineral to man, formed by the elemental forces of heat and pressure up to 50 miles below the earth, more than three billion years ago. This universally adored precious stone is 140 times harder than sapphire and ruby, which explains why it is symbolic the world over for everlasting love. The' brilliance' and 'fire' within a diamond is caused by its high refractive index - the highest of any naturally occurring gemstone - so the light will bounce and reflect within the stone, which along with its ability to be highly polished, creates the exquisite 'sparkle' effect.