Robinson's Jewelers Blog / glass-filled ruby

Discover the latest trends, tips, and insights in the world of fine jewelry with Robinson's Jewelers' official blog. Dive deep into the mesmerizing realm of precious metals and gemstones. Whether you're a jewelry aficionado or seeking styling advice, our curated articles are here to enlighten and inspire.

Close-up photo showing a flashlight beam revealing a blue flash effect inside a glass-filled ruby stone.

How to Tell If a Ruby Is Glass-Filled (Flashlight Test) - Your Shocking DIY Detective Guide

Maya Thompson Posted on December 29 2025
So, you're eyeing a stunning ruby ring or admiring a family heirloom, and a tiny, naggi...
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