, G & C mines, Cornwall, England, no.
And there is the matter of associations: Rob's crystal is "naked," but one of Jeff's has a euhedral, pale orange, terminated crystal of childrenite
measuring about 3 mm clinging to one side.
(1995), on the discovery of childrenite
; and works by other scientists including Vladimir Zebec and Vesna Srot.
They included a gemmy, vibrantly reddish purple 1.5-cm euhedron (on matrix) of sodalite; a pristine, bright orange, wedge-terminated childrenite
; the world's finest gem crystal of vayrynenite; a 1.5 x 3-cm, totally gemmy bastnasite-(Ce) prism; a gemmy pink, 2.5-cm pezzottaite crystal from Afghanistan; a small but screaming bright yellow stibiotantalite crystal; a superb emerald cluster from Pakistan, and more--45 pieces in all.
Trusty Jordi Fabre had about 60 small specimens from a September 2006 find of childrenite
at a brand-new locality in Brazil: Lavra do Poco Dantas near Taquaral, Minas Gerais.
A few other matrix pieces are studded with pretty, sparkling, dark brown spheres composed of microcrystals of childrenite
. Other rare phosphate species are probably present as well.
There were 12 bicolored red/green scepter tourmaline crystals of highest quality; brazilianite matrix specimens 30 cm wide; superbly crystallized rose quartz clusters with childrenite
rosettes; doubly terminated herderite crystals more than 10 cm long, on matrix; morganite crystals with phantoms; euclase crystals to 6 cm, the smaller ones richly colored.
Associated minerals are: albite, potassic feldspar, roscherite, viitaniemiite, childrenite
, quartz, apatite, herderite, elbaite and montmorillonite.
Of particular interest are assemblages such as rose-pink monazite-tourmaline-cassiterite-quartz; complexly twinned red greenockite with wavellite; childrenite
with vauxite, paravauxite, and wavellite; wavellite with fluorapatite; and vauxite with metavauxite.
It is probably no coincidence that natural occurrences of rose quartz crystals are usually found associated with phosphate minerals, for example the occurrence of childrenite
with the pink quartz crystals from Brazil.
set out to describe every piece, but I'll "label" a few I especially liked which were not pictured in the issue: arsenopyrite/stannite from China (12 x 12 cm); ilvaite/quartz from Dalnegorsk (12 x 15 cm); hambergite from Afghanistan (a transparent blade 7 cm high); childrenite
from Afghanistan (a perfect, loose 4.5-cm twin); arsenic from Germany (a smooth, perfect sphere 3.5 cm in diameter); moschellandsbergite from Germany (many crystals to 1 cm covering a 7-cm matrix); silver from Michigan (an electric-white arborescent tree 12 cm high); elbaite from Afghanistan (an 8 x 10 x 12 cm blue-pink polished-treestump lookalike on matrix).