SHOP 160,000+ BUY IT NOW GEMSTONES
OR TRY OUR AUCTIONS WITH NO BUYERS FEES
100% NATURAL GEMS & VERIFIED SELLERS
Video Player is loading.
Current Time 0:00
Duration -:-
Loaded: 0%
Stream Type LIVE
Remaining Time -:-
 
1x
    • Chapters
    • descriptions off, selected
    • captions off, selected
      96dd282d-d367-4fe0-8a1f-91d918b54092.jpg
      93e699d7-7139-46c2-bcd0-f718f4216282.jpg
      94bab1e2-bdb5-47ea-8886-dcc47e569b6e.jpg

      You have not bid on this auction.

      $70.00
      Current Bid
      11
      Bids
      2d 14h 35m 39s
      15/02/2025 01:33 pm

      Rarest stone Hackmanite 1.50 Ct Natural Color Change Hackmanite From Afgha

      11
      2146
      9

      SKU
      Dimensions (mm)
      8.400 x 6.400 x 5.200mm
      Weight (cts)
      1.500
      Clarity
      SI
      Type
      Faceted
      Colours

      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 materials.


      Shipping provider Shipping to Thailand Shipping to rest of world
      Standard Shipping - Tracked $8.00 / 7 days $15.00 / 21 days
      Thailand
      Standard Shipping - Tracked is discounted to $10.00 on orders with 2 or more items
      Rest of the world
      Standard Shipping - Tracked is discounted to $20.00 on orders with 2 or more items
      FedEx $35.00 / 2 days $35.00 / 4 days
      Thailand
      FedEx is discounted to $35.00 on orders with 2 or more items
      Rest of the world
      FedEx is discounted to $40.00 on orders with 2 or more items

      natugems
      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.
      Bangrak, Thailand
      Verified
      2248 Feedback

      Bids History (11)

      Reserve not met

      1 year ago
      $69.00
      zachonite
      2 years ago
      $38.00
      zachonite
      2 years ago
      $32.00
      zachonite
      2 years ago
      $31.00
      zachonite
      2 years ago
      $30.00
      zachonite
      2 years ago
      $29.00
      zachonite
      2 years ago
      $8.00
      zachonite
      2 years ago
      $7.00
      zachonite
      2 years ago
      $6.00
      2 years ago
      $5.00
      jimothy
      3 years ago
      $1.00

      Audit

      The Gemstone Sheriff program allows our members to request an audit on any product, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.

      Shipping Details

      Shipping:
      $15.00 21 days via Standard Shipping - Tracked
      Ships from:
      Thailand

      Payment Options

      • paypal

      Overview

      Listing Type : Standard
      Product ID : 1742750
      Estimated RRP : $800.00
      Starting Bid : $1
      Starts : 1st February 2025 01:33 pm PST
      Ends : 15th February 2025 01:33 pm PST
      * All prices are in USD