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$4,000.00 USD
PVP estimado $8,000.00
Cerrado
01/10/2021 11:33 pm
1173
7
Rarest 13.80 Carat Top Quality Loupe Clean Bastnasite Gemstone
1173
7
- SKU
- Dimensiones (mm)
- 12.150 x 11.500 x 8.900mm
- Peso (cts)
- 13.800
- Tipo
- Faceted
- Colores
-
Bastnäsite-(Ce), which has the chemical formula
(Ce,RE)(CO3)(F,OH), and parisite-(Ce), or
Ca(Ce,RE)
2(CO3)
3(F,OH)2, are cerium-dominant
rare-earth (RE) carbonates. Although they very rarely
form as crystals large and clean enough for faceting,
one locality in Pakistan (Zagi or Zegi Mountain) has
produced bastnäsite-(Ce) that has been faceted into
stones up to 20 ct (Johnson, 1999; Obodda and
Leavens, 2004). Gem-quality parisite-(Ce) has been
reported very rarely, usually associated with
Colombian emeralds such as those from Muzo (Henn
et al., 1992). In fact, the mineral is named in honor of
J. I. Paris, one of the first managers of the Muzo mine
(Palache et al., 1963). This note reports on bastnäsite-
(Ce) and parisite-(Ce) from Malawi’s Mt. Malosa,
where these minerals occur as well-formed crystals
that locally may contain clear, gem-quality portions
(e.g., figure 1). One of the authors (AG) visited the
deposit in 2002 for research purposes, and has documented the geology and mineralogy of the area in
other publications (e.g., Guastoni et al., 2007, 2009).
- SKU
- Dimensiones (mm)
- 12.150 x 11.500 x 8.900 mm
- Peso (cts)
- 13.800
- Tipo
- Faceted
- Colores
-
Bastnäsite-(Ce), which has the chemical formula
(Ce,RE)(CO3)(F,OH), and parisite-(Ce), or
Ca(Ce,RE)
2(CO3)
3(F,OH)2, are cerium-dominant
rare-earth (RE) carbonates. Although they very rarely
form as crystals large and clean enough for faceting,
one locality in Pakistan (Zagi or Zegi Mountain) has
produced bastnäsite-(Ce) that has been faceted into
stones up to 20 ct (Johnson, 1999; Obodda and
Leavens, 2004). Gem-quality parisite-(Ce) has been
reported very rarely, usually associated with
Colombian emeralds such as those from Muzo (Henn
et al., 1992). In fact, the mineral is named in honor of
J. I. Paris, one of the first managers of the Muzo mine
(Palache et al., 1963). This note reports on bastnäsite-
(Ce) and parisite-(Ce) from Malawi’s Mt. Malosa,
where these minerals occur as well-formed crystals
that locally may contain clear, gem-quality portions
(e.g., figure 1). One of the authors (AG) visited the
deposit in 2002 for research purposes, and has documented the geology and mineralogy of the area in
other publications (e.g., Guastoni et al., 2007, 2009).
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Envío:
$13.00 :cuenta días a través de :proveedor
Se envía desde:
Thailand
Opciones de pago
Descripción general
Tipo de listado :
Standard
ID del Producto :
1305388
Empieza : 27th September 2021 04:50 am PDT
* Todos los precios están en :moneda