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bb: Sumatran Black Amber - Enormous 494 Carat Piece, Bright Blue-Fluorescent!
bb: Sumatran Black Amber - Enormous 494 Carat Piece, Bright Blue-Fluorescent!
bb: Sumatran Black Amber - Enormous 494 Carat Piece, Bright Blue-Fluorescent!
bb: Sumatran Black Amber - Enormous 494 Carat Piece, Bright Blue-Fluorescent!
bb: Sumatran Black Amber - Enormous 494 Carat Piece, Bright Blue-Fluorescent!
bb: Sumatran Black Amber - Enormous 494 Carat Piece, Bright Blue-Fluorescent!
bb: Sumatran Black Amber - Enormous 494 Carat Piece, Bright Blue-Fluorescent!

bb: Sumatran Black Amber - Enormous 494 Carat Piece, Bright Blue-Fluorescent!

$ 10.55

Availability: 100 in stock
  • Item must be returned within: 14 Days
  • Refund will be given as: Money Back
  • All returns accepted: Returns Accepted
  • Return shipping will be paid by: Buyer

    Description

    NOTE:
    Postal delays caused by the pandemic are affecting
    delivery of parcels. In the USA, most delays are minimal. Shipping to other countries is currently taking at least several days to a week or more longer than usual. Please keep this in mind while bidding.
    Species:
    "Black" Amber
    Locality:
    Bukit Barisan, Sumatra, Indonesia
    Size:
    Cabinet - 7.3 x 5.8 x 4.0 cm
    Weight:
    494.5 ct (98.9 g)
    Number:
    2378
    Details:
    Here's a huge, beautiful chunk of unusual amber that would make a fantastic specimen, or provide superb lapidary potential. This comes from rock strata exposed by coal mining in Indonesia. Though it's called black, the color is really a translucent deep golden to reddish brown, more like cola. It has a strong blue fluorescence, best under longwave UV; it also shows yellow phosphorescence after strong UV exposure. Some of this material (the very expensive kind!) looks blue in sunlight from the natural ultraviolet; this piece isn't quite that bright, but it's real amber, 23 million years old, beautiful in daylight and exciting under UV. Note: this amber fluoresces very brightly under the new filtered longwave UV LED flashlights (i.e. Convoy S2 or C8).
    NOTE: TO VIEW FLUORESCENCE, YOU NEED A QUALITY ULTRAVIOLET LIGHT WITH A UV FILTER!
    The better the UV source, the better fluorescent minerals look. Cheap "UV" flashlights without filters will not provide satisfactory results!
    The photos here are taken using Convoy S2 and C8 (longwave-365)
    and UV Systems SuperBright II (shortwave-254) lamps, metered
    and exposed to show fluorescent response to best advantage.
    Key factors include lamp wattage, UV spectrum and filtration, as well as distance from lamp to specimen. For best results with any UV source, observe against a dark, non-fluorescent, non-reflective background, in complete darkness with eyes adapted. For extended viewing, use protective UV-absorbing goggles.
    ° ° ° ° °  PLEASE READ BEFORE BIDDING  ° ° ° ° °
    * For combined shipping of Auction Items, send a message! I will hold auction items up to 2 weeks.
    Please WAIT for invoice before paying. Once paid, I must ship quickly or my rating suffers.
    * For combined shipping of Buy It Now items, please Add items to Cart and Request Total for a quote.
    * Payment is due within 7 days of invoice unless other arrangements are made. PayPal is preferred.
    * Send a message for details, especially for shipments outside the USA.
    INTERNATIONAL CUSTOMERS:
    * US Post Office policy can make economical shipping a challenge. Price increments for packages are as follows:
    First class up to 225 g, then 225-900 g, then 900-1350 g (Canada only).
    Higher weights require Priority Mail.
    I always try to make shipping as cost-effective as possible. Please send a message so we can work things out.
    * Please note that import duties, taxes or charges are not included in the item price or shipping fees and are the
    buyer’s
    responsibility.
    While most countries do not charge duty on mineral specimens, you should check in
    your own co
    untry to be sure before bidding.