mineral specimens
rare minerals
mineral dealer
systematic minerals
Black Hills minerals
fine minerals
mineral dealer
Dana minerals
IMA minerals
mineral collections
rock and minerals
gem crystal
0 item @ $0.00  

Mineralpedia Details for Caysichite-(Y)

Reset

Caysichite-(Y)

Caysichite-(Y)

Formula
(Ca,Yb,Er)4Y4Si8O20(CO3)6(OH)ยท7H2
Crystal System
Orthorhombic 
Crystal Habit
Pulverulent, Reniform, Stalactitic 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
colorless, green, greenish yellow, white, light yellow 
Streak
white 
Class
Orthorhombic - Pyramidal 
Hardness
4.5 
WebMineral
View Caysichite-(Y) 
Mindat
View Caysichite-(Y) 

Caysichite-(Y) from Evans-Lou mine, Wakefield Lake, Quebec, Canada

Caysichite-(Y)
            from Evans-Lou mine, Wakefield Lake, Quebec, Canada
Special Info
Type Locality

White prismatic Caysichite-(Y) crystals in radial sprays to 1mm or less in the tiny open vugs in REE pegmatite matrix. The Evans Lou pegmaitite was originally mined from 1939 to 1952 for feldspar, when 25,000 tons were mined. It was mined later for silica when a 20x40 mass wwas mined. A lot of the Rare Earth minerals were thought to come from this quartz mass or near the contact with perthite. Evans Lou is a unique pegmatite enriched in yitrium-niobium-bismuth-vanadium. Huge Allanite crystals were mined here, one crystal was 4x2 ft.

This is a fantastic specimen with soapy white radial crystal groups to 1mm in size with good definition and open spaces between the groups. Cross-sections and terminations are visible.

Name is derived from the elemental abbreviations of the minerals's chemical forumula are juxtaposed {Ca(Calcium)-Y(Yttrium)-Si(Silica)-Ch(Charbonate)} to make the name.

Click thumbnail images for larger view.

All photos by Dakota Matrix and are Copyrighted © and may not be used without permission. Copyright © 2020 - Dakota Matrix Minerals, Inc. Privacy | Terms & Conditions | Site Map