Search the Community
Showing results for tags 'diamond'.
Found 9 results
-
Davemaoite, a new mineral from the lower mantle, found in diamond
Oxytropidoceras posted a topic in Rocks & Minerals
Diamond delivers long-sought mineral from the deep Earth Davemaoite is a vehicle for radioactive isotopes that help to heat the planet’s mantle. Alexandra Witze, Nature News Diamond from Lower Mantle Found with a New Type of Mineral; High-Pressure Silicate Material Davemaoite Discovered Second to Bridgmanite Ron Jefferson, Science Times, Nov 12, 2021 Diamond hauled from deep inside Earth holds never-before-seen mineral Researchers thought the mineral was impossible to find on Earth's surface By Harry Baker, Live Science, November 11, 2021 The paper is: Tschauner O, Huang S, Yang S, Humayun M, Liu W, Gilbert Corder SN, Bechtel HA, Tischler J, Rossman GR. Discovery of davemaoite, CaSiO3- perovskite, as a mineral from the lower mantle. Science. 2021 Nov 12 374(6569):891-894. doi: 10.1126/science.abl8568. Epub 2021 Nov 11. Yours, Paul H.-
- 3
-
-
-
- calcium
- davemaoite
- (and 6 more)
-
This is a bit of a question mark for me, this was inside of a piece of kimberlite that was found in Wyoming while out surveying gold claims. It is hard enough to scratch a genuine sapphire so it has to be a least a 8 on the moh's if i'm not mistaken.
-
Any Thoughts?
-
Nannodiamond plant microfossils created by extraterrestrial impact (open access paper)
Oxytropidoceras posted a topic in Fossil News
Shumilova, T.G., Ulyashev, V.V., Kazakov, V.A., Isaenko, S.I., Svetov,S.A., Chazhengina, S.Y., Kovalchuk, N.S., Karite – diamond fossil: a new type of natural diamond,Geoscience Frontiers, https://doi.org/10.1016/j.gsf.2019.09.011. (open access) https://www.sciencedirect.com/science/article/pii/S1674987119301768 Yours, Paul H.- 1 reply
-
- 2
-
-
- astroblemes
- cretaceous
- (and 12 more)
-
Hollow diamond enclosing another diamond found in Siberia, Russia
Oxytropidoceras posted a topic in Rocks & Minerals
A Diamond With a Whole Other Diamond Inside It Was Discovered in Siberia. Michelle Star, Science Alert, October 9, 2019 https://www.sciencealert.com/miners-have-found-a-hollow-diamond-with-another-diamond-rattling-around-inside Nyurba mining and processing division of ALROSA Press Release http://eng.alrosa.ru/58808/ Tiny, One-of-a-Kind Diamond Is Trapped ... Inside Another Diamond By Mindy Weisberger, Planet Earth, LiveScience https://www.livescience.com/double-diamond-siberia.html Miners have unearthed an ultra-rare diamond with a second diamond inside it. The inner gem is loose inside the first diamond, moving around freely — and could be the first example of such a diamond ever found in the world. Sean Keach, NewsComAu, October 10, 2019 https://www.news.com.au/technology/science/archaeology/ultrarare-diamond-with-another-diamond-inside-found-in-siberia/news-story/fc36004d80fd986200447dffab326b4f Yours, Paul H. -
Mysterious Mineral from Earth's Mantle Found in South African Diamond
Oxytropidoceras posted a topic in Rocks & Minerals
Mysterious Mineral from Earth's Mantle Discovered in South African Diamond By Nicoletta Lanese, Live Science, Planet Earth https://www.livescience.com/new-mineral-discovered-in-diamond.html https://www.sciencealert.com/single-grain-of-african-diamond-found-to-be-unlike-anything-the-world-has-ever-seen https://www.mirror.co.uk/science/mysterious-new-mineral-earths-mantle-20166701 The paper is: Meyer, N.A., Wenz, M.D., Walsh, J.P., Jacobsen, S.D., Locock, A.J. and Harris, J.W., 2019. Goldschmidtite,(K, REE, Sr)(Nb, Cr) O3: A new perovskite supergroup mineral found in diamond from Koffiefontein, South Africa. American Mineralogist, 104(9), pp.1345-1350. https://www.degruyter.com/view/j/ammin.2019.104.issue-9/am-2019-6937/am-2019-6937.xml https://pubs.geoscienceworld.org/msa/ammin/article/104/9/1345/573334/Goldschmidtite-KREESrNbCrO3-A-new-perovskite Yours, Paul H.-
- 2
-
-
- diamond
- goldschmidtite
- (and 3 more)
-
Man finds 2.2-carat diamond at Arkansas’ Crater of Diamonds State Park
Oxytropidoceras posted a topic in Rocks & Minerals
A teacher dug up a 2.12-carat diamond — and learned how much gems are really worth, Washington Post https://www.washingtonpost.com/science/2019/07/30/teacher-dug-up-carat-diamond-learned-how-much-gems-are-really-worth/ Nebraska teacher finds largest diamond of 2019 in Arkansas’ Crater of Diamonds State Park By Jami Ganz, New York Daily News, July 31, 2019 https://www.nydailynews.com/news/national/ny-diamonds-state-park-20190730-mhsp3mlfbvbxnbcpjrjotzd2ou-story.html Man finds 2.2-carat diamond at Arkansas State Park By Ben Hooper, UPI News, https://www.upi.com/Odd_News/2019/07/30/Man-finds-22-carat-diamond-at-Arkansas-State-Park/3841564499567/ Yours, Paul H. -
Largest known diamond in North America found in Canada
Oxytropidoceras posted a topic in Rocks & Minerals
Largest known diamond in North America found in Canada By Gisela Crespo, CNN, December 15, 2018 https://www.cnn.com/2018/12/14/world/552-carat-diamond-found-in-canada/index.html Dominion Diamond Mines announces the recovery of the largest diamond ever found in North America at Diavik https://www.ddmines.com/dominion-diamond-mines-announces-the-recovery-of-the-largest-diamond-ever-found-in-north-america-at-diavik/ Yours, Paul H. -
Diamond’s 2-billion-year Growth Recorded Tectonic Shifts
Oxytropidoceras posted a topic in Rocks & Minerals
Diamond’s 2-billion-year growth charts tectonic shift in early Earth’s carbon cycle, Europlanet Media Centre, February 23, 2017 http://www.europlanet-eu.org/2-billion-year-old-diamond/ http://www.europlanet-eu.org/wp-content/uploads/2017/02/catholuminescence_composite.jpg https://www.sciencedaily.com/releases/2017/02/170223102126.htm Timmerman, S., J.M. Koornneef, I.L. Chinn, G.R. Davies, 2017, Dated eclogitic diamond growth zones reveal variable recycling of crustal carbon through time. Earth and Planetary Science Letters, 2017; 463: 178 DOI: 10.1016/j.epsl.2017.02.001 http://www.sciencedirect.com/science/article/pii/S0012821X17300614 Yours, Paul H.
