Lovely Sponge Quartz drop earring accentuated by Sunstone mini beads on Sterling silver.
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Sterling Silver Jewellery Care
Sterling silver is a mix of pure silver and other alloys, that make the metal stronger for use in jewellery making. These alloys react with chemicals found in air and produce tarnish (a darkening of the high shine metal).
Have no fear, your jewellery isn't damaged, this tarnish can also be caused by high moisture levels, exposure to sunlight and contaminants.
You should protect your sterling earrings by keeping them in airtight packages, use tarnish-resistant products (such as tarnish tabs or strips) that absorb harmful chemicals, and store sterling jewellery in a cool, dry place.
Most tarnish is easily removed by polishing with a mild abrasive or soaking in an anti-tarnish solution.