large blue diamond (U+1F537)

The emoji 🔷, also known as "Upwards Black Square" or "Black Diamond," is a geometric shape that consists of a solid black diamond or rhombus with its top point facing upwards. This emoji is often used to represent a high level of achievement, excellence, or quality, as well as to indicate a sense of importance or urgency. It can also be used to represent a black diamond on a ski slope, indicating an expert level of difficulty. Additionally, it can be used in a playful or decorative manner to add visual interest to text messages or social media posts.