Foldable Ruby Filter Identification Tool for Emerald and Gemstones

This Ruby Filter is made to filter out rubies from other red stones and can be helpful to sort real from lab created and/or glass stones, and from other red/pinkish-red stones.I've added photos with both the Ruby Filter (red) and the Chelsea Filter (green) over a variety of red/pinkish-red stones and labeled them so you can see what you may (should) see. Notice in the photos, only the rubies glow. Both these filters are used to distinguish rubies from other stones, with the Chelsea Filter used to distinguish other stones as well. But I find the Ruby Filter to work better JUST for sorting out rubies. The Chelsea Filter has it's own merits.TO USE:1.) Place your stone or piece of jewelry under a fairly bright light (I just use a LED flashlight. Incandescent will work too, but the fluorescence won't usually be as bright and may not be obvious to the untrained eye). The filter will work even in a lighted room as long as the light shining on the stones is brighter.2.) Open your Ruby Filter - DO NOT TOUCH THE GLASS FILTER AREA, the oils on your skin can damage the filter - and place it UP TO YOUR EYE - like a monacle, though it shouldn't touch your eye. Think dude on the Monopoly game box while shining the light down onto the stones. You do NOT need to be close to the stones with the filter, so feel free to sit up straight. As long as the light is close to the stones and bright, and your stones are real rubies, they will fluoresce and it will be obvious - see red photo, the glowing stones are real rubies while the other stones are not rubies and do not glow.NOTE: Most rubies (from various locations) will fluoresce (glow) brightly, but some will barely fluoresce, and may not at all or it's so faint you can barely see it. Lab created rubies may also fluoresce. The difference is often subtle in color, though in my experience, you will often see swirls or "streams" of fluoresnce in a lab created stone. If you look closely at the stone labeled "ruby simulant" on the red photo, you should see the fluorescent swirls I'm speaking of. They don't run through the entire stone. Glass-filled rubies (Mahaleo rubies, a genuine ruby with lead-glass filling the cracks and fissures to stabilize the stone) will fluoresce very brightly, often more brightly than an untreated stone.If you really want to have fun, test out UV lights at both 365 and 395 longwave (LW) and shortwave (SW) and compare to the results you see with the Ruby Filter. It will show very similar results, but MANY other stones fluoresce, and do so in different colors. Pretty amazing!I'm not sure what the chart they gave me is supposed to mean because I've never seen any of those reactions with previous Ruby Filters I've owned, and did not get those when I tested with this filter. Perhaps they were created testing super high quality expensive stones...or simulants/lab created? I've no idea.Long and short of it, this filter is well-made, came with a handy leatherette case with a snap to prevent it from falling out, and was an excellent price. I would definitely recommend it. If you do a little research beforehand, it will make using the Ruby Filter much more fun and enjoyable!

Great tool but just a heads up, real Ruby's or sapphires will glow with it a pink color not blue

Works just as it should…In the pictures, I had a piece of lab grown ruby and other stones (a couple of which were supposed to be ruby, but I was suspicious). Looking through the filter at the stones under bright light you can easily see the ruby’s fluorescence through the filter. Stones that are not ruby should appear dull and unaffected.I have no clue what the “color range” chart is in the description. I have never heard of that ise for a ruby filter. Google says its “Function: A ruby filter is designed to selectively transmit red wavelengths of light, making red stones appear more saturated while darkening other colors.” That is exactly what it does :) Works great. The other stones in my picture are quartz, cubic zirconium (pink), and sapphire. They did nothing when viewed under the filter.It is easy to use and a great value when used as a traditional ruby filter—in my opinion.

This doesn't follow the color scale advertized. your red gems will all just look red.

Looks good

This item is well made however that is where it ends. The item comes with no directions. Their website is lacking although you can print off the chart. Most of what I learned came from reading other people's reviews which I should have done first. I was looking for something to carry with me that I could use when buying a piece of jewelry 2nd hand. What I learned is that this is basically for loose stones, those not in settings, and you need to place them on top of a strong light source. Neither of which would work for me in the field. I have returned the item and continue to look for something that can suit my need

Very sturdy solid well made piece of equipment.Arrived well packaged and on time. Pleased with overall product.

Good addition to gemstone tool kit. easy to use.