Necklaces / Pendants by Kate Smith Our pretty aquamarine & silver swirl necklace features spirals of silver, delicately studded with 2 beautiful aquamarines. Fastened with a simple T-bar style catch.16mm diameter, with aquamarines measuring between 1.75-2.25mmOur silver and aquamarine earrings are a great match.Also available in a necklace with three aquamarines. Features Primary Material : sterling silver Other Materials : aquamarine Length (inches) : 16, 18 and 20 One of a Kind : No Metal : sterling silver Gems : aquamarine Hallmarked : Yes Cleaning InstructionsPerfumes, lotions and chemicals can all affect the look of jewellery over time.Using a soft (old!) toothbrush and warm soapy water can remove build-up of dirt/discolouration.Using hairdryer (on a low setting) afterwards will help to avoid water marks on your jewellery.Avoid contact with harsh chemicals, especially when wearing jewellery with gemstones.Wearing your jewellery (rather than keeping it hidden away in a box) is the best way to avoid tarnishing on silver! Your skins natural oils help to form a barrier against oxidisation.If you find your item of silver jewellery blackens when you first wear it, follow the above method of cleaning with a toothbrush & warm, soapy water.Initial discolouration should fade within time. It isn’t clear why this can happen to some people’s jewellery, but from researching, it seems it could be attributed to medication, diet or even pregnancy! (If you are male, you can probably rule out the last cause).FinishesFinishes that are applied to our jewellery can alter over time, simply due to everyday wear. This is more applicable to rings and bangles; satin & frosted finished pieces may become shinier with wear and polished items can become slightly duller with time.