Bismuth Crystals
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Mother Nature doesn't make Bismuth Crystals!  Bismuth is rarely found in nature in its elemental form. Of
growing interest in rock shops, however, are laboratory-grown bismuth crystals. These crystals, while not
natural, are nonetheless very interesting and sought after by the mineral hobbyist, collectors and rock hounds.
The unique look that these crystals offer is really something very special! Bismuth Pellets can also be a
valuable addition to your collection of metals.

Bismuth was discovered in 1753 by Claude Francois Geoffroy. It is a very unusual and rare heavy metal that is
solid at room temperature. It is more rare than platinum, ranking number 69 out of the 75 listed rare elements
found on Earth’s crust. One very interesting thing about bismuth is that its liquid form is denser than its solid
form. So as bismuth crystallizes, its solid form floats above the liquid. This effect is only found in 3 other cases
(water, gallium, and germanium).

Bismuth is a white, crystalline, brittle metal with a pinkish tinge. It occurs in a native state. Bismuth is the most
diamagnetic (repels magnets) of all metals. Its thermal conductivity is lower than any metal, except mercury.
Bismuth has a high electrical resistance normally and has the highest
Hall Effect (increase in electrical
resistance when placed in a magnetic field) of any metal. High-purity bismuth can form into distinctive and
beautiful hopper crystals.

Bismuth crystals are man-made or laboratory “grown”. They are normally made from commercial 99.99% pure
bismuth pellets. Bismuth melts at 271.3 degrees Centigrade / 520.34 degrees Fahrenheit / 544.45 degrees
Kelvin. Bismuth crystal growth time is between 4 to 10 minutes as they form in a cooling bismuth melt. In its
solid form, bismuth is incredibly fragile. However, the crystals form to show perfect cleavage, making it
tempting to handle and touch. The reason the crystal structure is so fragile is because the rapid growth causes
hollow stepped forms, called “hopper crystals”.

The iridescent coloring ranging through reds, blues, purples, gold and greens is due to a thin layer of bismuth
oxide that forms on the surface of the crystal as it cools. This is actually interference coloring, similar to the
coloring you see on soap bubbles and on oil slicks, and is based on how thick the oxide grows. The
brightness and color intensity can vary from sample to sample, depending on the quality and purity of the
bismuth used. Some labs report that adding voltage from a small battery helps control the coloring during its
formation.
Museum Specimens
Bismuth to make crystals is usually found
in the preferred form of 99.99% or better
pure Bismuth discs or pellets
Item# 46BC08179611
93.5g Bismuth Crystal
Made in America
$35.07
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(93.5 grams) and measures approximately
2.3 x 1.75 x 1.7" (59 x 44 x 43 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
16 gram pellets
25 gram pellets
All Photos taken in natural sunlight
Item# 47BC08173451
123.5g Bismuth Crystal
Made in America
$46.37
All Photos taken in natural sunlight
Item# 3BCB05185981
59g Bismuth Crystal on Base
Made in America

$39.87
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(59 grams) and measures approximately
1.6 x 1.29 x 1.19" (41 x 32 x 30mm)
Beautifully hoppered
crystal formation on a bismuth base...an excellent display
specimen!.
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(123.5 grams) and measures approximately
2.5 x 2.2 x 1.8" (64 x 57 x 46 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
Item# C3BC09161150
37g Bismuth Crystal
Made in America
$24.05
All Photos taken in natural sunlight
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(37 grams) and measures approximately
1.3 x 1.8 x 1.2" (33 x 46 x 31 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
Item# 48BC08175261
130g Bismuth Crystal
Made in America
$48.75
All Photos taken in natural sunlight
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(130 grams) and measures approximately
2.4 x 2 x 1.8" (62 x 52 x 45 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
Item# 1BGEODE05180682
442g Bismuth Geode
Made in America
$69.90
All Photos taken in natural sunlight
This unique Bismuth Geode Specimen was Hand-made in the U.S.A. Bismuth is an unusual crystal because it is a little known
metal that is even scarcer than silver within the earth's crust. Each crystal is “lab grown” and forms under the surface in a
pool of liquefied 99.9% pure bismuth.  The crystals form as the bismuth cools and a rainbow of colors are displayed as the
crystal grows and the liquid is poured off. The result is the incredibly rare and breathtakingly gorgeous metal art sculpture
that this process produces. Bismuth is one of only a few substances (water being another) that actually expands upon
freezing (solidifying). The liquid bismuth expands as it cools. The spiral, stair-stepped structure of bismuth crystals is the
result of a higher growth rate on the outside edges and a slower growth rate on the inside edges. The variations in the
thickness of the oxide layer that forms on the surface of the crystal causes different colors to be reflected, displaying a
breath-taking rainbow of colors.
This geode weighs 15.5 oz or 0.97 lb. (442g) and measures 3.4” (87mm) in diameter and is 1” (25mm) deep
All Photos taken in natural sunlight
Item# 51BC08178380
67g Bismuth Crystal
Made in America
$25.14
All Photos taken in natural sunlight
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(67 grams) and measures approximately
2.1 x 1.7 x 1.3" (54 x 43 x 35 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
Item# D2BC09161150
32g Bismuth Crystal
Made in America
$20.80
All Photos taken in natural sunlight
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(32 grams) and measures approximately
1.3 x 1.2 x 1" (34 x 32 x 27 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
Item# D3BC09161150
19.5g Bismuth Crystal
Made in America
$12.67
All Photos taken in natural sunlight
All Photos taken in natural sunlight
This stunning lab grown Bismuth Crystal is "Made in the USA" This Crystal weighs (19.5 grams) and measures approximately
1.1 x 1.1 x 0.9" (30 x 29 x 24 mm) Beautifully hoppered with a nice array of iridescent coloring that changes color as viewing angle changes.
Item# 54BC07175231
106g Bismuth Crystal
Made in America
$39.75
All Photos taken in natural sunlight
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(106 grams) and measures approximately
2.7 x 1.8 x 1.2" (68 x 45 x 32 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
Item# 55BC07171051
120g Bismuth Crystal
Made in America
$45.00
All Photos taken in natural sunlight
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(120 grams) and measures approximately
2.8 x 2.2 x 1.8" (71 x 56 x 46 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
All Photos taken in natural sunlight
Item# 49BC08175790
78g Bismuth Crystal
Made in America
$29.25
All Photos taken in natural sunlight
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(78 grams) and measures approximately
2.4 x 1.8 x 1.6  " (62 x 46 x 40 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
Item# 53BC07175790
78g Bismuth Crystal
Made in America

$29.25
This stunning lab grown Bismuth Crystal is "Made in the USA" This Crystal
weighs
(78 grams) and measures approximately
2.4 x 1.6 x 1.1" (60 x 42 x 29mm)
Beautifully hoppered "apocalyptic meltdown" with a nice array of iridescent
coloring that changes color as viewing angle changes.
All Photos taken in natural sunlight
Item# 56BC07175711
94g Bismuth Crystal
Made in America
$35.25
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(94 grams) and measures approximately
2.5 x 1.7 x 1.6" (63 x 43 x 40 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
All Photos taken in natural sunlight
Item# 57BC07173621
101g Bismuth Crystal
Made in America
$37.87
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(101 grams) and measures approximately
2.8 x 1.9 x 1" (72 x 49 x 27 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(101 grams) and measures approximately
2.8 x 1.9 x 1" (72 x 49 x 27 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
Item# 58BC07178361
131g Bismuth Crystal
Made in America
$49.13
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(131 grams) and measures approximately
2.5 x 2.2 x 1.5" (65 x 58 x 39 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
All Photos taken in natural sunlight
Item# 59BC07178331
107g Bismuth Crystal
Made in America
$40.13
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(107 grams) and measures approximately
2.4 x 2.1 x 1.4" (62 x 53 x 36 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
All Photos taken in natural sunlight
Item# 60BC07170531
108g Bismuth Crystal
Made in America
$40.50
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(108 grams) and measures approximately
2.5 x 1.6 x 1.4" (66 x 41 x 36 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
All Photos taken in natural sunlight
Item# 61BC07171070
56g Bismuth Crystal
Made in America
$21.00
This stunning lab grown Bismuth Crystal is "Made in the USA"
This Crystal weighs
(56 grams) and measures approximately
3 x 1.5 x 1.3" (76 x 38 x 35 mm)
Beautifully hoppered with a nice array of iridescent coloring that changes color as
viewing angle changes.
All Photos taken in natural sunlight
Item# 2BGEODE05183982
444g Bismuth Geode
Made in America
$70.21
This unique Bismuth Geode Specimen was Hand-made in the U.S.A. Bismuth is an unusual crystal because it is a little known
metal that is even scarcer than silver within the earth's crust. Each crystal is “lab grown” and forms under the surface in a
pool of liquefied 99.9% pure bismuth.  The crystals form as the bismuth cools and a rainbow of colors are displayed as the
crystal grows and the liquid is poured off. The result is the incredibly rare and breathtakingly gorgeous metal art sculpture
that this process produces. Bismuth is one of only a few substances (water being another) that actually expands upon
freezing (solidifying). The liquid bismuth expands as it cools. The spiral, stair-stepped structure of bismuth crystals is the
result of a higher growth rate on the outside edges and a slower growth rate on the inside edges. The variations in the
thickness of the oxide layer that forms on the surface of the crystal causes different colors to be reflected, displaying a
breath-taking rainbow of colors.
This geode weighs 15.6 oz or 0.97 lb. (444g) and measures 3.4” (87mm) in diameter and is 1” (25mm) deep