I received six rocks in my purchase order all as expected, and I will use mineral box again

Un nudo compacto de cristales de casiterita casi negros, con caras de brillo especular y bordes pardo-rojizos, elevado sobre un lecho de cristales laminares plateados. Xuebaoding, Sichuan; sobre un bloque de acrílico transparente. 2,8 × 1,8 × 2,5 cm, 34 g.
| Mineral | Casiterita |
|---|---|
| Localidad | Xuebaoding, Pingwu, China |
| Sistema cristalino | Tetragonal |
| Fórmula química | SnO2 |
| Dimensiones | 2.8 cm × 1.8 cm × 2.5 cm |
| Peso | 34 g |
| Color | Metallic |
| Tamaño | Miniature (up to 2 inches / up to 5 cm) |
| Especie mineral | Casiterita |
| Estado | Sin daños en las caras expuestas |
Un nudo apretado de cristales de casiterita casi negros corona esta pequeña pieza de Sichuan, con las caras pulidas hasta un acabado especular que devuelve reflejos blancos y duros y, a lo largo de los bordes más delgados, el resplandor pardo-rojizo que delata al mineral. Terminaciones agudas e interpenetradas erizan la parte superior, mientras un lecho de cristales laminares blanco plateado recorre la base y levanta el grupo por encima de ella.
La casiterita es dióxido de estaño, SnO2, y el principal mineral de mena de estaño del mundo. Cristaliza en el sistema tetragonal en prismas cortos y bipirámides agudas que con frecuencia se unen en maclas en forma de codo: las formas anudadas aquí, y nunca octaedros. Con dureza de 6 a 7 en la escala de Mohs, es dura y notablemente pesada para su tamaño, con un brillo adamantino a submetálico mucho más vivo de lo que sugiere su color casi opaco.
Compacta, con 2,8 × 1,8 × 2,5 cm y 34 g. El cúmulo se envía sobre el bloque de acrílico transparente que se ve aquí, y estas tomas registran ese grupo de cristales exacto.
Sí. Cada espécimen es una pieza única — las fotos muestran exactamente la pieza que recibirás, nunca una foto de archivo.
Sí — especímenes como este se forman de manera natural. Como es habitual en el sector, algunas piezas se limpian o recortan con delicadeza; fotografiamos el espécimen real y describimos su origen y estado con prudencia.
Los pedidos se envían a todo el mundo con envío asegurado y seguimiento, cuidadosamente embalados para proteger los cristales frágiles. Se incluye una base expositora.
Sí — dispones de un plazo de devolución de 14 días.
I received six rocks in my purchase order all as expected, and I will use mineral box again

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Reçu très rapidement. Très beaux cristaux.

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