Crystal Knowledge — SageStone

May 9, 2026

Sugilite Is the Rarest Purple Gem You Have

Sugilite KNa2(Fe,Mn,Al)2Li3Si12O30 cyclosilicate with lithium and manganese. Discovered 1944 by Ken-ichi Sugi, gem quality found 1976 South Africa.

May 9, 2026

Amethyst Is Just Purple Quartz (But How It Gets

While the factual information has been verified against geological sources, the structure and phrasing were assisted by artificial intelligence.. Purple.

May 9, 2026

There Are Two Different Minerals Called Jade

Nephrite Ca2(Mg,Fe)5Si8O22(OH)2 amphibole, Jadeite NaAlSi2O6 pyroxene, completely different minerals. Nephrite Mohs 6-6.5 jadeite 6.5-7.

May 9, 2026

Azurite: Deep Blue Mineral Behind Renaissance Ar

Azurite was the blue pigment behind Renaissance masterpieces before synthetic alternatives existed. Learn its geology, why it turns green, and how to identif...

May 9, 2026

Fluorite Comes in Every Color You Can Think Of

Fluorite CaF2, name from Latin fluere meaning to flow. Colors: purple green blue yellow pink clear brown, rainbow fluorite has multiple colors.

May 9, 2026

Malachite Has the Most Beautiful Green Stripes

Malachite Cu2CO3(OH)2 copper carbonate, name from Greek malache meaning mallow. Green concentric banding from alternating mineral layers. Mohs 3.

May 9, 2026

Variscite Is Turquoise Cousin That Nobody Knows

Variscite AlPO4-2H2O discovered 1837 in Bavaria Germany. Green to blue-green with white matrix veining.

May 9, 2026

6 Types of Opal and What Makes Each One Special

Opal SiO2-nH2O with play of color. Six main types: White opal from Coober Pedy Australia most common, Black opal from Lightning Ridge most valuable, Boulder...

May 9, 2026

Tiger Eye Used to Be Blue Asbestos Before It

Tiger eye formed when crocidolite blue asbestos fibers were replaced by quartz then iron oxidized to golden.

May 9, 2026

Serpentine Gets Sold as Jade Every Day (Here Is

Serpentine Mg3Si2O5(OH)4 mineral group including antigorite chrysotile lizardite. Often sold as fake jade in markets. Test: jade RI 1.60-1.63 vs serpentine 1.

May 9, 2026

Baltic Amber and Dominican Amber Look Similar

Amber is fossilized tree resin, millions of years old. Baltic amber 40M years from pine trees, yellow to brown.

May 9, 2026

Moonstone Glows From the Inside (And People

Moonstone is orthoclase feldspar KAlSi3O8 with adularescence from light interference between feldspar layers. Romans believed it was Diana frozen tears.