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Fluorescent Meg and Otodus teeth
RhinoWater posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hello I have recently purchased an UV flashlight. Under the UV light, I noticed that a couple of shark teeth are glowing fluorescent. I have two megalodon tooth and both are from Carolina; strangely only one tooth glows and the other does not. The otodus tooth fluoresce as well. Is to be noted that all three tooth are from different sellers, but have been reputable for selling genuine fossils. (However, I could very well be mistaken on the genuineness of the teeth) Suspecting a clear coat or vanish has been applied, I have proceeded to use a cotton swab soaked with acetone on both glowing tooth. But the teeth remains unchanged. Is there a reason for the fluoresence (especially on the Meg tooth - where it glows for one and not the other)? Is fluoresence on fossilized shark teeth a normal/common occurence? Is fluoresence on such a large proportion of a fossil an indication of fakery? Apologies for the many questions and, thank you and appreciate any help and advice on the matter.- 13 replies
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Hello everyone, greetings and a big hug. I have already been reviewing the entire section for a few days. Is it real? and something caught my attention. In some specific cases of certain fossils they recommended using UV light to see if the fossil is real. (got the part about real fossils glowing while fake parts or the entire fake or painted fossil don't) The coolest example was of a crustacean in the genus Aeger where someone posted one that was completely fake and didn't glow at all UV light (obviously being a paint). I have a couple of questions about it. -Can this be done with all kinds of fossils or just with some? -Why is this happening? Is it because of the composition and if so, what type of composition do they have to have or what type of material is it that shines? -What kind of UV light is it? since the UV spectrum is very broad and they may only shine at a certain frequency of the UV spectrum and not at all, as is the case with some minerals that only shine at a certain UV frequency.
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I just got a new short-wave UV rig to replace my cheap and now defunct lamp. Besides wishing to check out fossils, I acquired some inexpensive mineral specimens to explore. Here they are alit. Pretty cool, but the iPad camera failed to capture the striking depth of the red-orange color. Red is Calcite and the green, Willemite.
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I found this piece of coral a long time ago some where on the southern us Atlantic coast probably South Carolina. I’m guessing it’s modern but I would still like to know what kind of coral it is, it’s also fluorescent especially the bottom
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Fun with Fakes- Moroccan Mosasaur
LabRatKing posted a topic in Is It Real? How to Recognize Fossil Fabrications
So after the oreodont fun, I’ve be checking my entire collection and the university collection. This is a known Mosasaur fake I got for 10$ and often use as a doorstop in my office. looks like I have some Chiplodocus and Chunkasaurus reckt instead of the usual camel and goat. Note the blue green fluorescence is dust from the synthetic carpet. -
I was using my UV flashlight the other day and realized some stuff glow, I want to see what other people have found that is fluorescent, so far I have realized that a couple feathers and septarian glow under ultra violent light. Before After
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UV wavelength to detect restorations?
Owl_Roker posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hi All, Quick question for you. What UV wavelength should I be using to detect restorations? Will repairs show up under 395nm? Thanks.- 9 replies
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Whenever I bring home a new batch of fossils, I pull out my UV rock lamp. Why? Some fossils glow in the dark, but not in a uniform way. Variations in the mineral composition make for a variety of colors, even when the specimen seems fairly uniform in color in daylight. This can make small, hidden details really stand out. Case in point: This afternoon I was putting away some petrified wood I'd collected awhile back. I pulled out my black light to examine them because some of the wood from this site shows a rainbow of color under UV. This one particular piece was mostly orange under UV, though in camera the hues look different. What really got my attention, however, were a few really vibrant spots on one side. Insect traces! The petrified wood chip is only about 8 cm long. Even with a magnifier, some of the small details are hard to spot. I never would have spotted them in daylight, but they were super bright with the UV. Another box I was sorting through this week contained impressions of brachiopods and trilobites in plain, white limestone. It can be hard to see the contours in the matrix, but they show up much differently under the UV. Finally, UV light can be used to identify fossil mollusks whose patterns have bleached away. About 60% of fossil shells fluoresce and some species have been described based on the residual patterns made visible under ultraviolet light. Note: To photograph these, I used a Convoy UV LED flashlight. I set my camera on a tripod for a 4 second exposure at f/22, with ISO set to 1600. I had my DSLR's white balance set for daylight.
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I'm working on a really excellent mosasaur skull right now! I also read a 2014 publication by Johan Lindgren , Michael Caldwell, Takuya Konishi , and Luis Chiappe. In Convergent Evolution in Aquatic Tetrapods: Insights from an Exceptional Fossil Mosasaur they reveal some of the amazing details preserved on the famous Bonner Platecarpus specimen at LACM (LACM 128319) seen here: Like the LACM specimen, my new skull seems to have the same sort of differential phosphatization / preservation (?) of the scale pattern. Here is a figure from the article: Here are a few pictures of the parietal on the skull I am working on now: I promise I will share more pictures as the prep of this specimen continues! Until then, Merry Christmas! -KS
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From the album: Fossil Flourescence
A whelk shell of the family Busyconidae viewed under natural light at left and under short-wave ultraviolet light at right.© c 2017 Heather J M Siple
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From the album: Fossil Flourescence
A gastropod shell of the family Olividae viewed under natural light at left and under short-wave ultraviolet light at right.© c. 2017 Heather J M Siple
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From the album: Fossil Flourescence
A gastropod shell of the family Olividae viewed under natural light at left and under short-wave ultraviolet light at right.© c. 2017 Heather J M Siple
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From the album: Fossil Flourescence
A volute shell, Scaphella sp., viewed under natural light at left and under short-wave ultraviolet light at right.© c. 2017 Heather J M Siple
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From the album: Fossil Flourescence
Pycnodonte mutabilis, viewed under natural light at left and under short-wave ultraviolet light at right.© c. 2017 Heather J M Siple
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From the album: Fossil Flourescence
Mercenaria cuneata, viewed under natural light at left and under short-wave ultraviolet light at right.© C. 2017 Heather J M Siple
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From the album: Fossil Flourescence
A clam shell of the family Veneridae viewed under natural light at left and under short-wave ultraviolet light at right.© c. 2017 Heather J M Siple
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From the album: Fossil Flourescence
Stewartia anodonta viewed under natural light at left and under short-wave ultraviolet light at right.© c. 2017 Heather J M Siple
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From the album: Fossil Flourescence
Stewartia anodonta clam viewed under natural light at left and under short-wave ultraviolet light at right.© c. 2017 Heather J M Siple
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From the album: Fossil Flourescence
Stewartia formani clam viewed under natural light at left and under short-wave ultraviolet light at right.© c. 2017 Heather J M Siple
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From the album: Fossil Flourescence
Stewartia formani viewed under natural light at left and under short-wave ultraviolet light at right.© c. 2017 Heather J. M. Siple
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