* Tradition: The Queen is known for her love of pearls, and they've been a staple of royal jewelry for centuries. Wearing multiple strings of pearls can be seen as a way of showcasing the royal collection and upholding tradition.
* Elegance: Multiple strands of pearls create a visually striking and elegant effect, complementing the Queen's attire and adding a touch of formality. They also enhance the classic and timeless appeal of her outfits.
* Versatility: Pearls are versatile and can be worn with a variety of outfits, from formal gowns to more casual daywear.
It's important to note that the Queen's jewelry choices often reflect the occasion and the particular outfit she's wearing. While she may favor multi-strand pearls, she also wears other jewelry pieces, including necklaces, bracelets, and earrings.
Ultimately, the reason why the Queen might wear three strings of pearls is a combination of tradition, personal preference, and the desire to create a certain visual effect.