Product DescriptionThese beautiful man-made crystals float to the top of a super-cooled bismuth melt and form within minutes. Bismuth is one of the few materials that have a greater density as a liquid than as a solid. Only a few other materials such as water, gallium and germanium, exhibit this property. The trigonal crystal structure accounts for the cubic formations. The iridescent rainbows of colors observed are caused by light scattering off thin layers of bismuth oxide formed when the surface of the hot bismuth reacts with the air. Specimens range from 12 to 17g with a density of 9.81 g/cc. Great for teaching about crystals, states of matter or even as a gift!
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Top ReviewsCame intact and beautiful
by Dominique (5 out of 5 stars)
September 29, 2015
Mine arrived intact and beautiful, though I was nervous after reading reviews about them breaking in transit.
by ROBERT BERZINS (5 out of 5 stars)
March 15, 2016
I ordered this for my wife who likes the look of the Bismuth Crystal, she was very pleased when the package arrived. The Crystal is small but totally intact and the variety of colors is very nice! She is debating on how to display it in our home.
Gorgeous, but sharp edges from cutting mean it isn't for kids.
by Sam (3 out of 5 stars)
July 8, 2016
The bismuth, as expected, is gorgeous. However, it is a very small sample and it is violently sliced down from a larger crystal, meaning there are sharp, metallic edges that have to be hidden to enjoy the specimen. If you are an adult looking to put this down somewhere and look at it without touching it much, it's fine. However, the sharp edges make it inappropriate for kids.
Gorgeous bismuth crystal!
by Maggie McMeekin (5 out of 5 stars)
April 17, 2014
My bismuth crystal is gorgeous! It looks very much like the picture, I was stunned at the vibrant colors and the characteristic shape of it. I have wanted a bismuth crystal for years and have had up close shots of them as my desktop wallpaper or cell phone background for years, and I am glad to own one now. This would be a unique gift for any science-loving individual you may know. It would also be a fascinating thing for a child to bring into school for a presentation or show and tell.
I did not have any problems or concerns with my crystal's shipping or appearance. My bismuth crystal arrived intact, and was packed very cautiously: wrapped in tissue paper, then placed in a cardboard protective frame, then placed in a box completely stuffed with newspaper shreds which absorbed any impact or blows the shipping box might have sustained in transit. I was very pleased with the time and attention given to safely packaging my product, someone clearly spent quite a bit of time and did it by hand.
Received 3 small pieces
by KarinCa (2 out of 5 stars)
December 6, 2018
Instead of the 1 crystal as promised, I received three small pieces. I first thought they broke apart in transit (would not be surprising considering there's only cushioning on one side of the rock, the other side scratches against cardboard box), but upon looking at the breakage point (which look silver), it's clear that this never was one single rock. I wouldn't have bought it if that were stated. I will try to go to some local gem stores and see if I can find a better one, if not, I'll hold on to this one as it's at least nice colors and interesting shapes.
by MaidenofMetal (5 out of 5 stars)
October 23, 2015
My bismuth arrived less than two days after ordering it. The colors are not as deep as pictured, but it has a full rainbow spectrum from end to end, and the structure is beautifully formed.
Periodic Table Rlement 83
by Raymond Risley (5 out of 5 stars)
November 6, 2017
I am new to Bismuth Crystals I bought this Crystal and a 2 pound Bismuth ingot for my Brother as a Christmas gift.
As far as this Crystal I am very pleased with it! It weighs 17 grams has a nice shape and very colorful
I attached 2 photos
Small crystal arrived in substandard packaging.
by Donald Rivette (2 out of 5 stars)
January 18, 2019
Poor packaging. Cheesy cardbox box w tissue paper was crushed upon arrival. Specimen weight was within quote weight but the 2 inch by 2 inch must be for the box because my bismuth crystal was 1/2 inch by 1/2 inch. Dissapointed in size compared to other vendors. Good thing it wasnt a decent piece because it most certainly would have been broken... wont buy again. Ill pay more for a better quality piece with better packaging. Looking through reviews, many have arrived broken... not too smart decision making by the owner/shipping dept. At least invest some in packaging to insure it arrives unbroken! Flimsy envelope and flimsy tiny cardboard box wont protect squat. You lost a business customer by your cheapness.
the one crystal i got was nice. about half inch by half inch square
by jeremy parsons (5 out of 5 stars)
March 1, 2016
the one crystal i got was nice. about half inch by half inch square. if you want to melt the remainder down, you will need to order a lot more than this tiny sample. you will need at least 1 pound or 16 ounces to do any thing with it. if you dont believe me, look it up on youtube videos, you will need a large pan full of this stuff to use it to any real degree of usefulness
Wonderful! My dad loved this
by Amazon Customer (5 out of 5 stars)
June 17, 2016
Wonderful! My dad loved this! However, if you want a super well-defined, perfect crystal, find something a little pricier. Some corners developed in a slightly warped manner, but you only notice it if you're looking closely. Wonderful colors, looks better than the picture. I love it!
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