Review on Discover The Details: JARLINK 2 Pack 30X 60X Illuminated Jewelers Eye Loupe Magnifier With LED Light For Gems, Coins, Stamps And More by Becky Stewart

At 60x it seems like viewing down a tube because of light reflection off the innermost plastic surface.but it's a decent clean image over 2/3 of the field of vision. Comparing with the decent onboard 30x triplet lens, an old B&L 14x, triplet, new iPhone 10 with 10x moment magnification lens and a new Zeiss 10x lens as well as a big 50mm Zeiss Macro at maximum magnification on a computer setup, II can actually do better with this crazy cheapo thing. Using my test rock I can identify very fine grained galena with certainty. The light is a little too blue so colors get washed out but the galena is visibly separable at 60x from sphalerite by cleavage and reflectivity. I could only guess with the Zeiss computerized Macro camera setup. I know because I compared the test fine grained lead-zinc test sample from a woodchuck hole where I live, I tested the rock with a 200x Dinolite scope so I did my homework. The only fancy lens I have not checked it against is the famous Iwamoto 20x. I will do it soon but this crazy little Jarlink is a wonder when dealing with a dusting of drab "black" minerals in a beige background of dolomite of no obvious interest at the naked eye level. I plan on taking two of these babies for analysis and logging of 2000 m of core in Chile next week. I'm in the copper business as a mine owner/geologist dealing with some big outfits and I need to know what I'm doing to survive. Since testing I have adopted this lens as a backup for the USB microscopes I have and as a way to make best use of the much slower and more complicated Dinolite. I bought 20 little toy watch batteries for these Jarlinks and plan on using them all up. I don't think they are particularly sturdy but they do work quite well. I am surprised. little LED light is a necessity at 60x. The beautiful little Zeiss hand lens was nice and bright overall but I could absolutely not find any signs of very fine grained galena in the drab sphalerite dusted dolomite.not at all even though I knew it was there. not at 14x or 30x! I ordered a little 40x with a UV light because I'm hunting for signs of Fluorite in the copper mining work with some very very strong UV equipment. I'm still waiting for the Iwamoto I just rebought but those things cost $125 each. An Iwamoto is considered the industry's best available hand lens. If it beats an Iwamoto.I would give this a big fat first place. Right now it's running well in a tough race. If you take anything less than a 20x in the field or core lab prepare to miss stuff, important economic mineralization at grades that are near ore. This is an amazing thing to discover. I found I can't see the copper at 3,000 ppm worth a damn. Ore is at 5,000 ppm Cu ! Imagine not even being able to see what you want to mine.and have to rely entirely on chemistry and a few petrographic thin sections at $1000 each. You don't know what you are doing at all. I already beat out some very experienced mining geologists 15 years ago on my Cu property with my 20x Iwamoto. I started finding strange bluish covellite like material and ultimately found it was fine grained bornite all over the place! This is a big deal. It took 15 years and a strong Dinolite Edge USB scope at 200x to prove my original suspicions using the Iwamoto. I'm teamed up with a team Lindsey award winner right now and he and I agree. He is credited at finding a supergiant copper deposit in Chile.Los Solfatos. He laughs when I pull out crazy stuff new stuff but it makes up for my having significantly less experience at discovering Porphyry Copper mines in Chile;.plus my eyes are getting old.like almost 70! and I have not yet won a "Prospector of the Year" Lindsey.given out by the biggest mining development association in the world for one man achievements.