The Gems Inside the Jewelry Boxes of Europe's Royals

As Queen Elizabeth celebrates her 90th birthday - which CNN reports includes a family portrait with four generations of royals and walkabout near her main residence in Windsor - we can't help but reflect on the sophisticated style Europe's reigning families persistently radiate. Even the little, everyday things seem special when the backdrop is a palace: It's difficult not to indulge in the precise ways royals make their beds or the foods Queen Elizabeth refuses to eat.

Now, you can also get your fill with a peek inside the royal jewelry boxes. British jewelry company George Pragnell has created an infographic that features detailed illustrations and explanations of jaw-dropping gems from six of Europe's royal families.

While Kate Middleton's engagement ring is iconic (it was once Princess Diana's), the many other pieces in royal collections are also stunning. Take, for example, Sweden's 19th-century amethyst necklace, which can be disassembled into two bracelets. Or, consider Spain's Prussian tiara, which was created in 1913 and was famously worn by Queens Sofia and Letizia at their weddings. A word of warning: The information below may induce high levels of awe and envy. Take a look: