A diamond solitaire is a type of ring that contains a single diamond without any extra diamonds or other gemstones around the centre stone or the shank of the ring.
In general, the term “diamond solitaire” can be referred to all jewellery types, including earrings and necklaces, with just one diamond. In other words, this simple and clean design is about the centre stone.
It is also worth mentioning that nowadays, the term “diamond solitaire” can also be referred to as rings featuring a single centre diamond and a pavé band. In such a case, solitaire is used to indicate that the ring features just one centre stone without extra stones around it.