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Found 17 results

  1. Barrelcactusaddict

    Claiborne Amber (Cockfield Fm., 41.3-38 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    8.0g prepared rough specimen displaying a partially polished face, measuring (mm) 50x22x14; this piece is a transverse section, and displays numerous layers or flow lines with sequences of micro bubbles as well as sediments. This material was recovered from the Malvern Clay Pits, east of Malvern, Arkansas. FTIR spectrum comparison of Claiborne amber to modern Shorea sp. resin points to the Dipterocarpaceae as a probable source for this middle Eocene-aged amber.

    © Kaegen Lau

  2. Barrelcactusaddict

    Borneo Amber (Upper Nyalau Fm., 20.44-15.97 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Borneo Amber Merit Block Coal Deposits Kapit Division, Sarawak State, Malaysia Upper Nyalau Formation 20.44-15.97 Ma Weight: 351.5 grams Dimensions: 123 x 86 x 45 millimeters The specimen arrived freshly cut from what was a larger, football-sized specimen; with a minor amount of shaping/sanding, I then polished it as best I could. This material is very soft, so a glassy polish similar to that of harder ambers isn't possible. Borneo amber is essentially coeval in age with Sumatra amber, or at least its Formations (upper Gumai, Air Benakat, and lower Muara Enim), being Early to Middle Miocene in age. Like Sumatra amber, it is derived from a dipterocarp tree source, and is similar in color, clarity, and hardness. Both ambers also were deposited during periods of active volcanism, and indicators are easily seen in much material (esp. Sumatra amber): light-colored, opaque "swirls" are a common sight and are actually tiny suspended droplets of congealed resin, having formed in the presence of considerable heat. Direct and indirect effects of volcanism, such as reduced light due to ash clouds, caused great stress to the resin-producing trees, and enormous quantities of resin were produced: the largest single specimen of amber in the world was uncovered in Sarawak, and weighed 68 kilograms (~150 pounds).

    © Kaegen Lau

  3. Barrelcactusaddict

    Borneo Amber (Upper Nyalau Fm., 20.44-15.97 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Borneo Amber Merit Block Coal Deposits Kapit Division, Sarawak State, Malaysia Upper Nyalau Formation 20.44-15.97 Ma Weight: 351.5 grams Dimensions: 123 x 86 x 45 millimeters *Fluorescence under 365nm UV light The specimen arrived freshly cut from what was a larger, football-sized specimen; with a minor amount of shaping/sanding, I then polished it as best I could. This material is very soft, so a glassy polish similar to that of harder ambers isn't possible. Borneo amber is essentially coeval in age with Sumatra amber, or at least its Formations (upper Gumai, Air Benakat, and lower Muara Enim), being Early to Middle Miocene in age. Like Sumatra amber, it is derived from a dipterocarp tree source, and is similar in color, clarity, and hardness. Both ambers also were deposited during periods of active volcanism, and indicators are easily seen in much material (esp. Sumatra amber): light-colored, opaque "swirls" are a common sight and are actually tiny suspended droplets of congealed resin, having formed in the presence of considerable heat. Direct and indirect effects of volcanism, such as reduced light due to ash clouds, caused great stress to the resin-producing trees, and enormous quantities of resin were produced: the largest single specimen of amber in the world was uncovered in Sarawak, and weighed 68 kilograms (~150 pounds).

    © Kaegen Lau

  4. Barrelcactusaddict

    Borneo Amber (Upper Nyalau Fm., 20.44-15.97 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Borneo Amber Merit Block Coal Deposits Kapit Division, Sarawak State, Malaysia Upper Nyalau Formation 20.44-15.97 Ma Weight: 351.5 grams Dimensions: 123 x 86 x 45 millimeters The specimen arrived freshly cut from what was a larger, football-sized specimen; with a minor amount of shaping/sanding, I then polished it as best I could. This material is very soft, so a glassy polish similar to that of harder ambers isn't possible. Borneo amber is essentially coeval in age with Sumatra amber, or at least its Formations (upper Gumai, Air Benakat, and lower Muara Enim), being Early to Middle Miocene in age. Like Sumatra amber, it is derived from a dipterocarp tree source, and is similar in color, clarity, and hardness. Both ambers also were deposited during periods of active volcanism, and indicators are easily seen in much material (esp. Sumatra amber): light-colored, opaque "swirls" are a common sight and are actually tiny suspended droplets of congealed resin, having formed in the presence of considerable heat. Direct and indirect effects of volcanism, such as reduced light due to ash clouds, caused great stress to the resin-producing trees, and enormous quantities of resin were produced: the largest single specimen of amber in the world was uncovered in Sarawak, and weighed 68 kilograms (~150 pounds).

    © Kaegen Lau

  5. Barrelcactusaddict

    Borneo Amber (Upper Nyalau Fm., 20.44-15.97 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Borneo Amber Merit Block Coal Deposits Kapit Division, Sarawak State, Malaysia Upper Nyalau Formation 20.44-15.97 Ma Weight: 351.5 grams Dimensions: 123 x 86 x 45 millimeters The specimen arrived freshly cut from what was a larger, football-sized specimen; with a minor amount of shaping/sanding, I then polished it as best I could. This material is very soft, so a glassy polish similar to that of harder ambers isn't possible. Borneo amber is essentially coeval in age with Sumatra amber, or at least its Formations (upper Gumai, Air Benakat, and lower Muara Enim), being Early to Middle Miocene in age. Like Sumatra amber, it is derived from a dipterocarp tree source, and is similar in color, clarity, and hardness. Both ambers also were deposited during periods of active volcanism, and indicators are easily seen in much material (esp. Sumatra amber): light-colored, opaque "swirls" are a common sight and are actually tiny suspended droplets of congealed resin, having formed in the presence of considerable heat. Direct and indirect effects of volcanism, such as reduced light due to ash clouds, caused great stress to the resin-producing trees, and enormous quantities of resin were produced: the largest single specimen of amber in the world was uncovered in Sarawak, and weighed 68 kilograms (~150 pounds).

    © Kaegen Lau

  6. Barrelcactusaddict

    Borneo Amber (Upper Nyalau Fm., 20.44-15.97 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Borneo Amber Merit Block Coal Deposits Kapit Division, Sarawak State, Malaysia Upper Nyalau Formation 20.44-15.97 Ma Weight: 351.5 grams Dimensions: 123 x 86 x 45 millimeters The specimen arrived freshly cut from what was a larger, football-sized specimen; with a minor amount of shaping/sanding, I then polished it as best I could. This material is very soft, so a glassy polish similar to that of harder ambers isn't possible. Borneo amber is essentially coeval in age with Sumatra amber, or at least its Formations (upper Gumai, Air Benakat, and lower Muara Enim), being Early to Middle Miocene in age. Like Sumatra amber, it is derived from a dipterocarp tree source, and is similar in color, clarity, and hardness. Both ambers also were deposited during periods of active volcanism, and indicators are easily seen in much material (esp. Sumatra amber): light-colored, opaque "swirls" are a common sight and are actually tiny suspended droplets of congealed resin, having formed in the presence of considerable heat. Direct and indirect effects of volcanism, such as reduced light due to ash clouds, caused great stress to the resin-producing trees, and enormous quantities of resin were produced: the largest single specimen of amber in the world was uncovered in Sarawak, and weighed 68 kilograms (~150 pounds).

    © Kaegen Lau

  7. Barrelcactusaddict

    Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Palm-sized piece roughly 80g in weight. There is a very thin layer of coal on the top and bottom of the piece, making it a good example of a seam-type formation. It's blue coloration is purely surface fluorescence, initiated in this case by a 140 lumen LED light; this fluorescence (especially under a non-LW UV light) is caused by the presence of an exceptionally high concentration of various hydrocarbons contained within the amber.

    © Kaegen Lau

  8. Barrelcactusaddict

    Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Palm-sized piece roughly 80g in weight, from the previous entry. Transmitted light through the deepest portion of the piece displays the amber's deep red coloration.

    © Kaegen Lau

  9. Barrelcactusaddict

    Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Palm-sized piece roughly 80g in weight, from the 2 previous entries. This photo better displays the surface fluorescence of the specimen.

    © Kaegen Lau

  10. Barrelcactusaddict

    Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.3g dark, transparent blue amber from West Sumatra. After grinding and polishing, I was surprised to discover that it contains 2 ants and 2 winged ants (possibly wasps); these were a little tricky to photograph, due to the amber's strong fluorescence under 140 lumen LED light, so these inclusions had to be backlit. I used a Canon EOS 500D, Canon 60mm f/2.8 Macro Lens, and combined 2x and 4x Hoya circular magnifier lenses (8x).

    © Kaegen Lau

  11. Barrelcactusaddict

    Claiborne Amber (Cockfield Fm., 41.3-38 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    1.4g translucent specimen measuring (mm) 16x15x10; one side presents an unbroken exterior, with slight remnants of sand, clay, and lignitic matrix. This material was recovered from the Malvern Clay Pits, east of Malvern, Arkansas. FTIR spectrum comparison of Claiborne amber to modern Shorea sp. resin points to the Dipterocarpaceae as a probable source for this middle Eocene-aged amber.

    © Kaegen Lau

  12. Barrelcactusaddict

    Claiborne Amber (Cockfield Fm., 41.3-38 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.1g rough specimen measuring (mm) 25x18x15. This is a section of a run, with successive layers grading from translucent to opaque; portions of the sand, clay, and lignitic matrix coats the exterior as depicted. This material was recovered from the Malvern Clay Pits, east of Malvern, Arkansas. FTIR spectrum comparison of Claiborne amber to modern Shorea sp. resin points to the Dipterocarpaceae as a probable source for this middle Eocene-aged amber.

    © Kaegen Lau

  13. Barrelcactusaddict

    Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.3g dark, transparent blue amber from West Sumatra. Lateral view of the same Psudomyrmex inclusion in the previous entry. The antennae appear to have clubbed tips, but each is actually coated/overlain by a congealed drop of resin within the amber itself (this type of suspended resin formation is characteristic of and common in Indonesian amber).

    © Kaegen Lau

  14. Barrelcactusaddict

    Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.3g dark, transparent blue amber from West Sumatra. This inclusion is most likely a winged ant of the Pseudomyrmex genus, although it may possibly be a wasp. A positive identification of both winged subjects is challenging, due to their deteriorated state and their position within the piece.

    © Kaegen Lau

  15. Barrelcactusaddict

    Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.3g dark, transparent blue amber from West Sumatra. This displays 3 of the 4 inclusions contained in the piece itself, each one a Pseudomyrmex sp. (the winged ants may possibly be wasps, but it is unlikely).

    © Kaegen Lau

  16. Barrelcactusaddict

    Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    4.3g dark, transparent blue amber from West Sumatra. The inclusion is that of a slightly deteriorated specimen of Pseudomyrmex sp. of ant. There is very little documentation, written or photographic, of the flora and fauna inclusions in Indonesian amber, which makes me all the more excited to have discovered this piece!

    © Kaegen Lau

  17. Barrelcactusaddict

    Sumatra Blue Amber (Sinamar Fm., ~30 Ma)

    From the album: Fossil Amber and Copal: Worldwide Localities

    Small (5-8g) partial nodules of raw blue amber from the east flank of the Bukit Barisan range of West Sumatra. These pieces are clear as glass, and fluoresce very nicely under a 140 lm LED light. *This Sumatra material (and Indonesian amber in general) is believed to have been produced by a parent tree belonging to the Dipterocarpaceae family; it's spectroscopic signature is also incredibly similar to Bitterfeld amber (also produced by a dipterocarp source tree). **This blue amber's particular locality is part of the Sinamar Fm., and the layers containing the resin are dated to be approximately 30 Ma (Oligocene, mid-Rupelian); the amber-bearing strata of this formation is located at a depth of approximately 32-39 m, and is composed of hard, banded coal (sub-divided into two layers of slightly different grades, 2.5m and 4.5m thick). I have 15 pieces, and these are the ones I haven't yet pre-formed. The piece in the upper-right corner is pre-formed (diamond needle files), and it is ready for increasing grades of sandpaper (240-3000 grit), and a final polish with a denim cloth and polishing compound (ZAM).

    © Kaegen Lau

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