'Colour Change' FLOURITE is a fascinating stone which changes colour depending on the light source. In daylight these are a gorgeous, vibrant blue but in iridescent light change to a warm pink tone. The stones are quality 10mm x 8mm Ovals set in 18ct Yellow Gold on 925 Sterling Silver. They are Brilliant Cut and are 4.9 cts. in total. Post and Butterfly back design. These earrings would be stunning for a special occasion.