My Finita claw set stud earring design is a simplicity itself, and this pretty, open setting lets the light pour in to the stones making them sparkle all day. And like my Theresa studs, they are part of my interchangeable collection of earrings, becoming the centre of attention in my halos: purple amethyst Finita's sparkle even more with a Cactus diamond halo, and green chrome diopside Finita's feel uplifted with the gold Shippo halo.

Tourmaline comes from the Sinhalese term "turamali" meaning 'stone of mixed colours'. As part of an isomorphous series, in which a range of chemical compositions occur in many individual crystals, they can be found in almost every colour. From pinks, reds, forest greens and blues, colourless and transparent to multi-coloured and opaque shades, making it one of Cassandra's favourite gemstones. The birthstone for October, it appears to have an affinity with the autumnal time of year, its myriad of colours resembling autumn leaves, falling in a cacophony of colour. Turn to pink tourmalines for an emblem of friendship and unconditional love, or delight in vibrant green tourmaline to harmonise your internal energies.