I've considered telling her it's a natural diamond, as the only way of being exposed is by a jeweler with an expensive loupe - or when she gets the ring appraised for insurance, which is, admittedly, a large risk.
我考虑过告诉她这是一颗天然钻石，因为暴露的唯一方法是珠宝商用昂贵的放大镜 - 或者当她对戒指进行保险评估时，诚然，这是一个很大的风险。