I just bought two matching stones at the SNAG conference (will report
later) for earrings. The stone is thulite. Can someone give me the
mohs scale rating for this stone?

Thulite is a pink massive Zosite. Hardness is 6 to 7.

Cathy, Thulite is zoisite and has a hardness of 6

Simon & Schusters Guide says 6.5


Cathy, Thulite has hardness 6 to 6,5 and it breakes easily.

Regards, A.Heim

Thulite is a zoisite (like tanzanite) and has a hardness of 6.5-7
mohs scale. have fun with the ear rings

Thulite is a red variety of Zoisite and the mohs is 6 - 6 & 1/2.

Joel Schwalb

cathy - am late in getting to my email so someone has probably already
answered this but schumann lists thulite (zoisite) at 6 - 6 1/2 -


Hello Cathy, Thulite is the gemstone name of the mineral zoisite Mohs
scale hardness = 6-7

Regards Keith Torckler, Cornwallis, New Zealand

According to June Culp Zeitner, Thulite has a hardness of 6.5… I
would also imagine there are different grades of - “Thulite” -
slabbed material, which would slightly vary in hardness, according to
the materials overall purity…


Hello Cathy,

Thulite is a variety of Zoisite, colored light red or pink by
manganese. Base Chemical Composition: Calcium Aluminum Silicate
Hydroxide Hardness: 6 - 6.5 Specific Gravity: 3.3 Crystal Structure:

Charles Heick
Cincinnati, OH

Cathy- Hardness of thulite is 6.5. Thulite is a pink or rose variety
of zoisite, first found in Norway near a place called Thule. Also
found in Western Australia and South America. In the US, a rich
rose-colored thulite occurs near Pilar, New Mexico. (from: Zeitner:
GEM & LAPIDARY MATERIALS, 1996 & Schumann:
GEMSTONES OF THE WORLD, 1977.) -Anita Cluett

Kathy, The hardness of your pretty pink stone is 6-7. As some may not
know, it’s a variety of the mineral zoisite–the better known variety
being tanzanite, which I always thought should be called “heat-treated
brown zoisite,” which nearly all of it has been. Another beautiful
variety is “ruby in zoisite,” in which the rubies contrast with a
beautiful green zoisite. But then, I’m sure you knew all this.

Gary Strickland, GJG

Cathy - thulite is a pink version of zoisite, hardness is: 6 to 7
according to GIA chart A. The crystaline version of zoisite is
tanzanite. Thulite is the national stone of Norway and found around

Judy Hoch

thulite is availablefrom Norway ina beautifulred pink and gretype mix
The thulte from Michegan is in a more muted gray base although
also shows the pink and red Leon K

Cathy, I don’t know the technical details on thulite, but I have cut
it and it’s pretty soft, but not fragile. It doesn’t break, crack, or
flake from normal handling but it would crumble if you hit it hard
enough. I wouldn’t put it in a ring but a pendant or earrings would
work. It’s a pretty pink and green…like a watered down version of
ruby and zoisite. Have fun with it!

Amy O’Connell
Amy O’Connell Jewelry