swap_horiz Sillimanite Alternatives

1

Blue Diamond

Blue diamonds belong to the fancy-color diamond category, with natural colors ranging from pale blue to stronger tones a...

Blue Fancy Color Rare Diamond

9.02 Excellent

2

Yogo Sapphire

Yogo sapphires are blue corundum gemstones mined from deposits at Yogo Gulch in central Montana, United States. They are...

Blue American Collector Montana

8.27 Great

3

Andradite Garnet

Andradite is a calcium-iron nesosilicate mineral species belonging to the garnet group. It forms in contact metamorphic...

Collector Rare High Dispersion Garnet

8.12 Great

4

Zoisite

Zoisite is a calcium aluminum hydroxyl sorosilicate mineral belonging to the epidote group. It naturally occurs in a ran...

Collector Green Tanzania Silicate

8.05 Great

5

Benitoite

Benitoite is a rare blue barium titanium cyclosilicate mineral that was first discovered in 1907 in San Benito County, C...

Blue Jewelry Rare Barium Titanium

7.82 Good

6

Indicolite

Indicolite is the name commonly applied to blue or blue-green specimens of elbaite, a mineral in the tourmaline group. I...

Blue Collector Vibrant Rare

7.76 Good

7

Purple Sapphire

Purple sapphire is a colored variety of the mineral corundum, distinct from ruby by its specific hue. The gemstone achie...

Collector Jewelry Rare Purple

7.54 Good

8

Pezzottaite

Pezzottaite is a rare mineral species recognized for its distinct raspberry-red to pink coloration, often utilized as a...

Collector Rare Madagascar Beryl

7.48 Good

9

Euclase

Euclase is a rare beryllium aluminum silicate mineral with the chemical formula BeAlSiO₄(OH). Its name derives from the...

Collector Rare Brazil Blue Green

7.10 Good

10

Blue Amber

Blue amber is an uncommon variety of fossilized tree resin known for producing a blue or blue-green appearance under ult...

Organic Collector Rare Dominican Republic

7.04 Good

11

Phenakite

Phenakite, also spelled phenacite, is a beryllium silicate mineral with the chemical formula Be2SiO4. It commonly forms...

Collector Rare Colorless Silicate

7.03 Good

12

Brazilianite

Brazilianite is a sodium aluminium phosphate mineral with the chemical formula NaAl3(PO4)2(OH)4. It was recognized as a...

Collector Rare Brazil Phosphate

7.01 Good

13

Topazolite Garnet

Topazolite is a yellow to greenish-yellow variety of andradite, a calcium-iron garnet. It is known from Alpine localitie...

Collector Rare Yellow Garnet

6.86 Fair

14

Idocrase

Idocrase is the traditional name for vesuvianite, a calcium aluminum silicate mineral that commonly forms in skarn and o...

Collector Silicate Green Yellow Vesuvianite

6.73 Fair

15

Hambergite

Hambergite is a rare beryllium borate mineral first described in 1883 by the Norwegian mineralogist W. C. Brøgger. It wa...

Collector Rare Colorless Borate

6.66 Fair

16

Neptunite

Neptunite is an approved silicate mineral with the formula KNa2LiFe2+2Ti2Si8O24. It commonly forms black to dark-red mon...

Collector California Rare Black Red

6.38 Fair

17

Neptunite Cat's Eye

Neptunite is a sodium, lithium, iron, titanium, and silicate mineral known especially from San Benito County, California...

Collector Rare Black Red Silicate

5.54 Mediocre

18

Pumpellyite

Pumpellyite is a group of calcium, magnesium, aluminum, iron, and manganese silicate minerals formed mainly during low-g...

Collector Green Rare Metamorphic

5.12 Mediocre

19

Gahnite

Gahnite is the zinc-rich spinel-group mineral with the ideal formula ZnAl2O4. It was described from the Falun mine in Sw...

Blue Collector Jewelry Rare

4.42 Poor

20

Ekanite

Ekanite is a rare thorium-bearing calcium silicate mineral with the ideal formula Ca2ThSi8O20. It was first found in the...

Collector Green Rare Radioactive

4.20 Poor