divorces, possibly because spending more than US$2,000 on an engagement ring is strongly associated with debt-related stress. Couples that spend less money on engagement rings and the wedding ceremony tend to have longer marriages and a lower risk of divorce. One reason for the increased popularity of expensive engagement rings is its relationship to human sexuality and the woman's marriage prospects. In the United States, until the Great Depression, a man who broke off a marriage engagement could be sued for breach of promise. Monetary damages included actual expenses incurred in preparing for the wedding, plus damages for emotional distress and loss of other marriage prospects. Damages were greatly increased if the woman had engaged in sexual intercourse with her fiancé. Beginning in 1935, these laws were repealed or limited. However, the social and financial cost of a broken engagement was no less: marriage was the only financially sound option for most women, and if she was no longer a virgin, her prospects for a suitable future marriage were greatly decreased. The diamond engagement ring thus became a source of financial security for the woman. The online purchase of engagement rings is growing, disrupting the market for the diamonds by bringing greater transparency to an industry that has traditionally relied on opacity. Online diamond retailers and e-commerce platforms include Blue Nile, Brilliant Earth, and Costco. Styles Engagement rings, like any other kind of jewellery, come in many different styles. Gold (Available in Yellow Gold, White Gold and Rose Gold) and platinum are preferred for engagement rings, but common metal types such as titanium, silver, and stainless steel are also used for engagement rings. This allows for the bride-to-be to exert her own individual style into the ring in a simple manner. In the United States, where engagement rings are worn by women, diamonds have been widely featured in engagement rings since the middle of the 20th century. Solitaire rings have one diamond. The most common setting for engagement rings is the solitaire prong setting, which was popularized by Tiffany & Co. in 1886 and its six-claw prong setting design sold under the "Tiffany setting" trademark. The modern favorite cut for an engagement ring is the brilliant cut, which provides the maximum amount of sparkle to the gemstone. The traditional engagement rings may have different prong settings and bands. Another major category is engagement rings with side stones. Rings with a