Blue Nile’s Valentine’s Day sale runs through February 14. You can find everything from diamonds to sapphires, emeralds and more, up to 50% off.

“Her jewelry and carvings are a feast for the eyes.” In 2013, Ms. Sarna won the association’s Carving Award for L’Heure Bleu, an abstract carving of a 703-carat blue-violet tanzanite set ...

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Overall, only 2.1% of the pine trees' rings and 1.3% of the juniper shrubs' rings were blue; the cells which hadn't lignified properly were mainly found at the end of growth rings, in latewood ...

Blue rings found in the stems of trees and bushes in Norway point to a historic cold period in the late 1800s, but the exact cause of this climatic event remains unclear, scientists say.

Scientists have discovered that peculiar "blue rings" in wood samples reveal the aftermath of chilling volcanic eruptions that disrupted growing seasons over a century ago. When summers turn ...

Taken from a tree in Norway, this stained tree sample shows a blue ring from 1902. (Credit: Pawel Matulewski and Liliana Siekacz) Human skin isn't the only thing that can change color after facing the ...

Fans gush over Chiefs tight end Travis Kelce's girlfriend, Taylor Swift, wearing a special ring before the 2025 Super Bowl.

Blue growth rings found in woody plant stems represent years when cells did not lignify properly because of summers too cold for growth When the going gets cold, even tough trees struggle with ...