We always have beautiful things to see at Borsheims. The artwork above the front entrance is definitely on that list!
This is a microphotograph of a Sri Lankan Sapphire.
The tiny cracks appear in the natural stones and are called rutile silk. When sapphires are heat-treated, these rutile silk can disappear. That is one way that jewelers inspect a stone, by looking for the natural inclusions within it.
A lot of technical info, but it sure makes a beautiful picture when photographed at 25x magnification! This photograph was done by John Koivula, an internationally known gem microphotographer. If you’re interested in his work, check out his website. It’s fascinating to see what these gemstones look like when viewed up close!