This gold-plated Märta Larsson Not a Pearl Necklace quartz necklace features a thick gold chain, lobster clasp to fasten, engraved logo tag and seven clear quartz stones attached with gold-plated hardware. Quartz is said to aid concentration and memory. Which is great news for us, seeing as it's taking all our focus to remember that adding this Märta Larsson necklace to bag is at the very top of our to do list.