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9Crt Most Rarest Color Change Hackmanite iahh63

SKU
Dimensioni (mm)
16.000 x 12.000 x 9.000mm
Peso (cts)
9.000
Treatment
No Treatment
Clarity
SI
Tipo
Rough, Specimen
Colori

Hackmanite is an exceptionally rare sulfur-rich variety of sodalite which exhibits tenebrescence (the ability of minerals to change color when exposed to sunlight). It was first discovered in Greenland in 1896 by L. C. Boergstroem, and was later named after Victor Axel Hackman (1866-1941), a Finnish geologist. However, it wasn't until recently (1991) that the first gem-quality hackmanite deposit was discovered in Quebec, Canada.

Hackmanite appears pale to deep violet when first mined, but once exposed to sunlight, the color quickly fades to grayish or greenish-white. When placed back into a dark place or when exposed to short wave ultraviolet light, the violet color slowly returns. The change in color can be seen within seconds of being exposed to sunlight, but the return of the original color can sometimes take up to a week. The tenebrescence effect can be repeated indefinitely, but is detroyed by heating.

The tenebrescence effect seen in hackmanite is the rarest of all gemstone optical phenomena. It is often confused with the 'color change' phenomenon, where materials can shift color under different types of light sources. Another term for tenebrescence is 'reversible photochromism'. A common example of reversible photochromism can be seen in everyday color-change eyeglass lenses. Color-change eyeglasses darken when exposed to sunlight and lighten up again when they are brought indoors. The effect is caused by a photochemical reaction to UV radiation and is known to occur in only a few rare materials.

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iahgems
We are best quality natural gemstones company in thailand we sell beautiful natural gemstones high quality and also beads and handicraft our office is in Bangkok Thailand .
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Verificato
: Feedback totale

  • titanrx
    titanrx
    Positivo

    Gorgeous looking piece, happy it arrived so quickly and well packaged.

  • titanrx
    titanrx
    Positivo

    Arrived looking better than the pictures. Well packaged and quick to ship.

  • aa-da
    aa-da
    Positivo

    Very nice stone.

  • oiler
    oiler
    Positivo

    Thank you for the opportunity to buy great gemstones

Verifica

Il programma Gemstone Sheriff consente ai nostri membri di richiedere un audit su qualsiasi prodotto, che è completato da una :qualificazione indipendente che valuta l'accuratezza della descrizione e delle immagini dell'articolo.

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Spedizioni da:
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Questo venditore aggiunge 10.00% tax alle transazioni in Thailand.

Panoramica

Tipo di elenco : Standard
Codice prodotto : 1767820
Inizia : 31st October 2024 08:57 am PDT
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