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Found 14 results

  1. From the album: Fossil Amber and Copal: Worldwide Localities

    Chiapas Amber Simojovel, Chiapas, Mexico La Quinta Fm./Mazantic Shale (Simojovel Group) 22.8-15 Ma Specimen (Rough): Weight: 11.8g Dimensions: 33x31x17mm Lighting: 140lm LED Longwave UV (365nm) About the Specimen: A thick, red oxidized layer was formed over millions of years through oxidation during the amber's burial. The blue-green fluorescence is due to exposure of the amber's hydrocarbons to UV wavelengths in the LED light. There are numerous fossil barnacles and barnacle scars, coating the exterior of the specimen. History: The amber of Chiapas has a history

    © Kaegen Lau

  2. Barrelcactusaddict

    Ethiopian Amber (Debre Libanos Sandstone; 23-16 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.7g polished specimen of amber from one of several deposits near Alem Ketema, Amhara Region, Ethiopia; piece measures 35x24x17mm. There is a thin vein of transparent material, while the rest is heavily included with organic detritus; some small fragments of plant material are seen in the transparent portions (see associated photo). The green coloration is partly due to the amber's autofluorescence initiated by the LED light (transmitted) during photography; the clear portions of this specimen present a yellow-green base color in incandescent light, and emit a greenish fluorescence in sunlight

    © Kaegen Lau

  3. Barrelcactusaddict

    Ethiopian Amber (Debre Libanos Sandstone; 23-16 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.7g polished specimen of amber from one of several deposits near Alem Ketema, Amhara Region, Ethiopia; piece measures 35x24x17mm. This view of the specimen displays organic detritus inclusions: in particular, a long fibrous subject (at center, beneath fluorescent layer) can be seen. The green coloration is partly due to the amber's autofluorescence initiated by the LED light (transmitted) during photography; the clear portions of this specimen present a yellow-green base color in incandescent light, and emit a greenish fluorescence in sunlight or LED light. Ethiopian amber deposits have been

    © Kaegen Lau

  4. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.7g piece of amber from the La Cumbre Mine, measuring (mm) 25x22x15. It has a couple marcasite inclusions: seen here is a protruding portion (one half remains inside the piece) that was perhaps a gas bubble, but later infiltrated with iron and sulfur in solution during burial, migrating via a fracture/microfracture; or it may be a permineralized organic/inorganic inclusion (shell, quartz pebble, etc.), which are documented in amber from the La Cumbre deposit, and is called "double fossilization": while this occurs in tiny grains of younger La Cumbre amber which were deposited after the older

    © Kaegen Lau

  5. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    5.4g piece of amber from the La Cumbre Mine, measuring (mm) 28x24x18. It has a couple marcasite inclusions: visible here, is a protruding portion (one half remains inside the piece) that was perhaps a gas bubble, but later infiltrated with iron and sulfur in solution, via a natural fracture/microfracture; the other is a natural fracture viewable on the opposite side, infiltrated and completely coated by marcasite: the thin film that begins at the rough, unbroken exterior (underside of specimen in picture). There are dozens of visible dual-phase, countless single-phase, and at least two triple-

    © Kaegen Lau

  6. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Triple-phase inclusion and a few in-focus single and dual-phase inclusions nearby. The triple-phase bubble is a narrow chamber, possibly part of a methane termite (incomplete, heavily oxidized); there are two organic solids, the larger preventing the migration of the gas bubble. These inclusions are contained within the 5.4-4.7g specimen depicted in the four related photos. This image was captured using a Samsung WB35F while holding a BelOMO 10x loupe between the lens and specimen.

    © Kaegen Lau

  7. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Triple-phase inclusion (center right) and over twelve, viewable dual-phase inclusions nearby. The triple-phase bubble contains movable particulates, which are slightly visible here in the lower-half portion of the bubble. These inclusions are contained within the 5.4-4.7g specimen depicted in the four related photos. This crude image was captured using a Samsung WB35F while holding a BelOMO 10x loupe between the lens and specimen.

    © Kaegen Lau

  8. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.7g piece of amber from the La Cumbre Mine, measuring (mm) 25x22x15. Seen at the base of the specimen is a natural fracture that was infiltrated and completely coated by marcasite during the resin's diagenesis, in a thin film that began at the previously rough, unbroken exterior (underside of specimen in picture). There are dozens of visible dual-phase, countless single-phase, and at least two triple-phase bubbles. These are easily seen in the other four related photos of the finished specimen. "Pyrite disease" is a major concern with this specimen; even with preservation in an airtight cont

    © Kaegen Lau

  9. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    5.4g piece of amber from the La Cumbre Mine, measuring (mm) 28x24x18. Visible here, is a natural fracture that was infiltrated and completely coated by marcasite during the resin's diagenesis, in a thin film that begins at the rough, unbroken exterior (underside of specimen in picture). There are dozens of visible dual-phase, countless single-phase, and at least two triple-phase bubbles. These are easily seen in the other four related photos of the finished specimen. "Pyrite disease" is a major concern with this specimen; even with preservation in an airtight container, oxidation is still pos

    © Kaegen Lau

  10. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Opposing view of same specimen from associated image, weighing 10.0g and measuring (mm) 40x31x20; note the rough, unaltered (i.e., unbroken, natural) exterior of the specimen. Most dominican amber is transparent to translucent, yet this specimen is more akin in appearance to the "butterscotch" variety of Baltic amber; I have not determined if the turbidity is due to microscopic air bubbles, or organic inclusions, though it is most likely the former. This type of dominican amber is sometimes seen as a thin layer/flow overlying transparent material, but this specimen is mostly whole, and it's un

    © Kaegen Lau

  11. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Small run of amber from the La Cumbre Mine, weighing 2.4g, and measuring (mm) 37x13x8. It consists of numerous successive flows, and contains several small single-phase bubbles; as this specimen does, several others I have (from the same 2kg lot) from this locality also display an interesting "schiller" effect when adjusted in-hand (light reflects off of the flow lines' surface). Biological inclusions are a possibility with this specimen, though I will need to prepare it to confirm this.

    © Kaegen Lau

  12. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Small run of amber from the La Cumbre Mine, weighing 2.4g, and measuring (mm) 37x13x8. It consists of numerous successive flows, and contains several small single-phase bubbles; biological inclusions are possible, though I will need to prepare the piece to confirm this.

    © Kaegen Lau

  13. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Dominican amber from the La Cumbre Mine, from the Cordillera Septentrional. Most pieces range from 5-10g in weight, with at least one containing a large two-phase inclusion (enhydro). Material from this mine frequently presents exterior crusts/aggregates of pyrite (iron sulfide); these were likely formed in a reducing, marine/lacustrine environment, where marine sediments, organic detritus, volcanic material (i.e., ash), and sulfate-reducing bacteria helped to provide the sulfides and iron needed.

    © Kaegen Lau

  14. Barrelcactusaddict

    Dominican Amber (La Toca Fm., 20.43-13.65 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    A rare and very unusual specimen, weighing 10.0g and measuring (mm) 40x31x20. Most dominican amber is transparent to translucent, yet this specimen is more akin in appearance to the "butterscotch" variety of Baltic amber; I have not determined if the turbidity is due to microscopic air bubbles, or organic inclusions, though it is most likely the former. This type of dominican amber is sometimes seen as a thin layer/flow overlying transparent material, but this specimen is mostly whole, and it's unaltered exterior does not indicate to its having overlain any previous flows. I uncovered this pie

    © Kaegen Lau

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