In halo rings, the major gemstone is accentuated by a circle of smaller diamonds or other gemstones, and the effect of the design is to make the center stone look larger than what it actually is.

Scientists refer to this phenomenon as a 22-degree halo. According to Earth Sky , “They got that name because the radius of the circle is always approximately 22 degrees.” ...

The folks at Space.com explained that the moon's “halo or lunar halo” is an optical illusion that causes a large bright ring to surround the moon. The halo or circle is created when light is ...

Here's when to spot a lunar halo in the night skyAlthough many lunar phenomena are one-night-only events, a ring around the moon is much less elusive. Also known as a lunar halo, a bright white ring ...

Known as a moon ring, a winter halo, or a 22-degree halo, it's when "ice crystals suspended high above in thin wispy cirrus clouds refract the moon's light to form a perfect circle," Meteorologist ...

Like a rainbow, the striking moon ring is caused by a refraction, or splitting of light, and also by a reflection of moonlight from tiny ice crystals in Earth's atmosphere, according to Earth Sky ...

Okay, it’s not literally on the nose. (But surely the Halo nose ring is moments away.) The cosmetic item, called “Perfect Circle,” actually floats just a bit above your Spartan’s head.