Additional Details
Small Business
Shop products from small business brands sold in Amazon’s store. Discover more about the small businesses partnering with Amazon and Amazon’s commitment to empowering them.
Small Business
This product is from a small business brand. Support small.
Hard Rock apparel
Outerwear, tees, and accessories. Discover the rock shop.
Frequently bought together
$99.99
In Stock
+
Total price:
To see our price, add these items to your cart.
Choose items to buy together.
Similar items that may ship from close to you
Page 1 of 1 Start overPage 1 of 1
Reviews with images
Accurate and Well-Made Refractometer
I have never owned a refractometer before but as I sometimes acquire semi-precious gemstones at estate sales, I ordered the Ade Advanced Optics device when I came across it.The refractometer comes in its own plastic carrying case along with a small sheet of instructions. The device looks and feels well-made. It takes three LR44 batteries to power the built-in LED light. The batteries are not supplied but they are easy to get hold of.The refractometer is smaller than I expected and measures approximately 4.5" by 2.5" by 1.25" and it is lightweight weighing just under 12 ounces with the batteries fitted.The instruction sheet diagram has the power switch and battery compartment reversed to the device I was sent but it's obvious which is the battery compartment and which is the power switch.I tested the device out by using a known stone which was citrine. It is necessary to put a small drop of the supplied R.I. liquid onto the prism and to then place the stone in question onto the liquid. Once that's done the upper cover is closed and the device can be turned on.The eyepiece can be moved to bring the scale into sharp focus if needed. My eyes are not as young as they used to be so this was a useful feature to me. The reading itself is determined by reading the scale at the light and dark point. It's more of a light and shadow point rather than light and dark but once you spot that it is easy from then on.The scale runs from 1.30 to 1.81 and is graduated to two decimal places. The stone I was using showed the light and dark point at a little over 1.54 which I looked up on the Internet and indeed that was correct for citrine.In use the refractometer was accurate and if you are considering getting one then I recommend taking a look at this Ade Advanced Optics device.
Top reviews from the United States
There was a problem filtering reviews right now. Please try again later.
Reviewed in the United States on November 13, 2023
Reviewed in the United States on April 14, 2024
Reviewed in the United States on September 2, 2023
Reviewed in the United States on November 2, 2023
Reviewed in the United States on September 21, 2023
This looks like a nifty small gadget, which can serve as a window into the refractive index (R.I.) of various gems. This helps with identification. Although I have enjoyed experimenting with this, I am disappointed that I did not receive the protective hard case with my package. Both hard and soft cases were listed as included. I have been interested in gems since I was a child, collecting rocks from our trips.
Its small size makes it easy to carry around. I measured it to be around 4-1/2” x 2-3/8” x 1-1/4”, with the soft vinyl pouch measuring around 6” x 4-1/4” x 2”. The soft pouch has a small handle on top and belt loop on the side, along with a tiny Velcro pouch perhaps for carrying a small vial of R.I oil or a small stone. I tried contacting the seller about the missing item but have not received a reply yet.
The included instructions helped with some basics but also left something to be desired. Some locations of parts were on opposite sides or unclear. I was also confused about my refractometer arriving with a small scratch under the lid and seemingly not functioning as well as I would like. Once I figured out how to open the LR-44 battery compartment, I had no trouble with it or the light. Batteries were not included in my package.
I tested a variety of stones using an R.I. oil (not included) with this gem refractometer . I was sad that my readings did not change from one stone to another. I believe there will be a learning curve. I liked that the eyepiece raises and lowers to fine tune one’s vision of the scale component (see photos). I am gaining the impression that each customer receives a package that has a little different contents. I think it may be difficult for some people to not know what to expect, especially considering the higher price, at the time of this review. Yet, others may not mind surprises. I would have preferred more consistency and concern.
Its small size makes it easy to carry around. I measured it to be around 4-1/2” x 2-3/8” x 1-1/4”, with the soft vinyl pouch measuring around 6” x 4-1/4” x 2”. The soft pouch has a small handle on top and belt loop on the side, along with a tiny Velcro pouch perhaps for carrying a small vial of R.I oil or a small stone. I tried contacting the seller about the missing item but have not received a reply yet.
The included instructions helped with some basics but also left something to be desired. Some locations of parts were on opposite sides or unclear. I was also confused about my refractometer arriving with a small scratch under the lid and seemingly not functioning as well as I would like. Once I figured out how to open the LR-44 battery compartment, I had no trouble with it or the light. Batteries were not included in my package.
I tested a variety of stones using an R.I. oil (not included) with this gem refractometer . I was sad that my readings did not change from one stone to another. I believe there will be a learning curve. I liked that the eyepiece raises and lowers to fine tune one’s vision of the scale component (see photos). I am gaining the impression that each customer receives a package that has a little different contents. I think it may be difficult for some people to not know what to expect, especially considering the higher price, at the time of this review. Yet, others may not mind surprises. I would have preferred more consistency and concern.
Images in this review
