Hello, I’m Gabriel Kleinberg, a Gemmology Diploma Tutor at The Gemmological Association of Great Britain (Gem-A) in London.

In Anthony Doerr’s bestselling novel All the Light We Cannot See, the chaos of World War II is reflected in the eyes of the book’s blind heroine—and represented by a shimmering, supposedly cursed ...

Abstract: In this work a new multiparameter sensor platform based on lossy mode resonances is presented. The structure consists of a soda-lime optical slab waveguide butt-coupled to multimode optical ...

Descending into Peshawar for the first time, a foreign tourist might be surprised to learn that amid the clutter of buildings in this historical city lies an important gem trading center. This market ...

While the use of phrases like "bumping this gem" was commonplace on /qa/ [1] as early as March 2018, gem and coal-centric Soyjaks did not gain notable traction on 4chan's /qa/ board until 2020. Shown ...

The Rudolph Research J257 Wide Range Refractometer was developed by working together with laboratory refractometer users from the polymer, petroleum, petrochemical, pharmaceutical and essential oil ...

Abstract: A temperature-insensitive fiber refractometer, which consists of a simple single-mode–multimode–single-mode fiber optic scheme, is theoretically proposed and experimentally demonstrated. The ...

Google is beginning to roll out the new Super Gems feature within Gemini, which integrates Opal apps directly inside the Gems Manager. The updated Gems Manager now presents two sections: the upper ...