THE PREMIER MARKETPLACE FOR REAL GEMS
$250.00 USD
Procijenjeni RRP $500.00
5168
8

Rarest stone Hackmanite 1.10 Ct Natural Color Change Hackmanite From Afghan

SKU
Dimenzije (mm)
10.000 x 6.000 x 5.300mm
Težina (cts)
1.100
Tip
Faceted
Boje

About Hackmanite - History and Introduction

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


Pružatelj usluge dostave Dostava u Thailand Dostava u ostatak svijeta
Standard Shipping - Tracked $8.00 / :dani dani $15.00 / :dani dani
:zemlja
Standard Shipping - Tracked je snižen na $10.00 na narudžbe s 2 ili više artikala
Ostatak svijeta
Standard Shipping - Tracked je snižen na $20.00 na narudžbe s 2 ili više artikala
FedEx $35.00 / :dani dani $35.00 / :dani dani
:zemlja
FedEx je snižen na $35.00 na narudžbe s 2 ili više artikala
Ostatak svijeta
FedEx je snižen na $40.00 na narudžbe s 2 ili više artikala

natugems
We deal in all kind of gemstones (Precious & Semi Precious) and also Rare gemstones.Collection Pieces, Fancy and different Cutting Exceptional Pieces are Available Here . All our stones are natural and top quality. NOTE ! Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.
:Grad drzava
Provjereno
:ukupne povratne informacije

Revizija

Program Gemstone Sheriff omogućuje našim članovima da zatraže reviziju bilo kojeg proizvoda, koju dovršava neovisna :kvalifikacija koja procjenjuje točnost opisa artikla i slika.

Detalji dostave

dostava:
$15.00 21 days putem Standard Shipping - Tracked
Brodovi iz:
Thailand

Načini plačanja

  • paypal

Pregled

Vrsta unosa : Standard
Identifikacijski broj proizvoda : 1742752
Počinje : 9th November 2024 01:39 pm PST
* Sve cijene su u :valuti