This page gathers the 12 minerals whose names begin with the letter J, running alphabetically from “Jadeite” all the way to “Juanitaite.” Some are familiar gemstones you might recognize, while others are rare specimens known mainly to collectors and scientists. Together they show up in jewelry, carvings, museum cabinets, and even research into the history of other planets.
Minerals are naturally occurring solid substances with a specific chemical makeup and an orderly internal structure. They form deep inside the earth, in volcanic rock, or as crystals settle out of mineral-rich water over long periods. One of these minerals, “Jadarite,” even made headlines because its formula closely matches the fictional “kryptonite” from a Superman film.
Below you’ll find the table with the Mineral and Description for each entry.
Mineral: This gives you the official name of each mineral, listed in alphabetical order so you can quickly scan the page and find the exact one you’re looking for.
Description: This offers a short, plain summary of each mineral, covering its color, makeup, and common uses so you can understand what makes it interesting at a glance.
Minerals
Mineral
Jadeite
Jarosite
Jasper
Jamesonite
Johannsenite
Jeremejevite
Jordanite
Jadarite
Joaquinite
Julienite
Junitoite
Juanitaite
Descriptions
Jadeite
A tough, fine-grained pyroxene mineral and one of the two true forms of jade, prized for carving and ranging from white to the highly valued emerald-green “imperial jade.”
Jarosite
A yellow-brown iron sulfate mineral that forms in acidic, oxidizing conditions; it was famously detected on Mars, hinting at the planet’s watery past.
Jasper
An opaque, microcrystalline variety of quartz, usually red, yellow, brown, or green, often banded or patterned and used as a gemstone for centuries.
Jamesonite
A gray-black, needle-like lead-iron-antimony sulfide mineral that often grows in fine, hair-thin fibrous masses, giving it a feathery appearance.
Johannsenite
A manganese-calcium pyroxene mineral, typically brown to greenish, that forms in metamorphosed manganese-rich and skarn deposits.
Jeremejevite
A rare, hard borate mineral forming colorless to pale blue or yellow crystals, occasionally faceted into prized collector’s gemstones.
Jordanite
A lead-arsenic sulfosalt mineral, lead-gray with a metallic luster, found in certain dolomite-hosted ore deposits.
Jadarite
A rare white sodium-lithium-boron silicate mineral, notable because its chemical formula closely matches the fictional “kryptonite” described in a Superman film.
Joaquinite
A rare brownish-yellow silicate mineral containing barium, titanium, and rare-earth elements, found in the famous benitoite deposits of California.
Julienite
A rare blue cobalt-bearing mineral that forms delicate fibrous or needle-like crystals.
Junitoite
A rare colorless calcium-zinc silicate mineral found in oxidized zones of certain copper deposits.
Juanitaite
A rare green to blue-green copper-bismuth arsenate mineral occurring as crusts and tiny crystals in oxidized ore zones.
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