Asianart.com | Associations | Articles | Exhibitions | Galleries |
Visitors' Forum |
Message Listing by Date: |
|
Message Index |
Back |
Post a New Message
| Search | Private Mail
| FAQ
|
Subject:JADE SPEAR HEAD
Posted By: Danny Fri, Feb 26, 2016 IP: 205.250.147.95 HETIAN INK JADE? THIS PIECE FEELS HEAVY WHEN HANDLE AND HAVE BRIGHT GREEN PATCHES ALL OVER THE SURFACE.BOTH SIDES HAVE THE SAME TAOTIE PATTERN. WHEN STRUCK WITH ANOTHER PIECE OF JADE AND IT SOUNDS LIKE METAL WITH HIGH PITCH.IT WEIGHT 846 GRAMS.7 INCHES TALL AND 3 INCHES WIDE. |
Subject:Re: JADE SPEAR HEAD
Posted By: rj Sun, Feb 28, 2016 I should have ask: Does a magnet stick to it? |
Subject:Re: JADE SPEAR HEAD
Posted By: rj Sun, Feb 28, 2016 Could it be peridot or olivine in a nickel iron matrix? Is it magnetic? |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Mon, Feb 29, 2016 Hi rj Sun, |
Subject:Re: JADE SPEAR HEAD
Posted By: Super Mon, Feb 29, 2016 Danny, I found your piece extremely interesting and mysterious. What is the metal sheen on its surface? Was it some types of metallic paint? On my screen, it appears to be silver color. Was it actually black? Can it be scratched? |
Subject:Re: JADE SPEAR HEAD
Posted By: Corey Tue, Mar 01, 2016 Picture provided by rj is of a pallasite meteorite. Can you make a density test? |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Wed, Mar 02, 2016 Hi Corey. |
Subject:Re: JADE SPEAR HEAD
Posted By: Corey Thu, Mar 03, 2016 You'll need an transparent container large enough to submerge the spearhead in. A syringe with a scale in milliliters. A digital weight and a calculator. |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Fri, Mar 04, 2016 Hi Corey. |
Subject:Re: JADE SPEAR HEAD
Posted By: Corey Mon, Mar 07, 2016 You're welcome! Glad I could help! Alternatively you can contact a gemologist to make the density test. He/she might also be able to determine the refractive index of the crystal structures in the matrix, if such are present. I would recommend you to get some more data on the material before you contact a museum. |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Tue, Mar 08, 2016 Hi Corey, |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Tue, Mar 01, 2016 Hello Super, |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Tue, Mar 01, 2016 Super, This jade color is dark (black)and under sunlight , it shows green patches all over. Also it can scratch glass easily. I bought this piece from the guy lived in Montreal, Quebec, Canada. |
Subject:Re: JADE SPEAR HEAD
Posted By: Super Wed, Mar 02, 2016 Hi, Danny: Thank you for posting your pictures which show your jade piece to be BLACK instead of silver. I believe the material is more than likely, 墨玉 mo yu or ink jade like you said. To be sure, you can do a scratch test on it and see what color you would see after the scratch. I was real surprised to see magnet could stick to it though. |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Fri, Mar 04, 2016 Hi Super, |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Fri, Mar 04, 2016 Hi Super, |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Sat, Mar 26, 2016 Hi Super, |
Subject:Re: JADE SPEAR HEAD
Posted By: Randy Tue, Mar 01, 2016 The polished slab is a Pallasite Meteorite, your images appear to display the same type structure. There is enough nickel in the iron in pallasites to patina, not rust. I'm attaching a link to an example. |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Wed, Mar 02, 2016 Hi Randy, |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Wed, Mar 02, 2016 Hi Randy, |
Subject:Re: JADE SPEAR HEAD
Posted By: Randy Thu, Mar 03, 2016 Here is one link, a google search turns up many more. If you live near a good museum of natural history a curator might be able to help determine the material it's made of. http://www.meteorite.com/fukang-meteorite/ |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Fri, Mar 04, 2016 Hi Randy, |
Subject:Re: JADE SPEAR HEAD
Posted By: Paola Di Maio Sat, Nov 17, 2018 Hellow. Over the years in Asia I collected a few similar arterfacts. the material is heavy, magnetic, rusty and some pieces have olivine in it magnetite attracts the magnet, but does not rust. do not leave a streak. |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Tue, Nov 20, 2018 Hi Paola, |
Subject:Re: JADE SPEAR HEAD
Posted By: Paola DM Tue, Nov 20, 2018 Thank you Danny. |
Subject:Re: JADE SPEAR HEAD
Posted By: DANNY Wed, Nov 21, 2018 Hi Paolo, |
Subject:Re: JADE SPEAR HEAD
Posted By: pdm Mon, Dec 03, 2018 Thanks again for sharing. this is so fascinating. I d like to (respectfully) suggest the hypothesis that nephrite and meteorites may share some characteristics and that a gemologist may have never seen a piece of meteorite containing jade like patches.so it would depend what exactly has the gemology tested? from the certificate, it appears that they used the refractivity test, but I speculate that the refractivity index of the green patches would have a different result than the refractivity index of the darker patches- |
Subject:Re: JADE SPEAR HEAD
Posted By: DANNY Mon, Dec 03, 2018 Hello PDM, |
Subject:Re: JADE SPEAR HEAD
Posted By: Paola Di Maio Mon, Dec 10, 2018 I think the easiest test is to check if the spheres on your specimen under microscope turn out to be chondroles (I cant spell it properly). take a magnified pic of the balls and send it to some meteorite expert. if the spheres are chondroles then you need to further test I think (they are only found in meteorites afaik, but check) |
Subject:Re: JADE SPEAR HEAD
Posted By: pdm Mon, Dec 03, 2018 Regarding the spheres, if I were you I d try to rule out they are chondrites (see pic linked below) |
Subject:Re: JADE SPEAR HEAD
Posted By: DANNY Mon, Dec 03, 2018 Hi PDM, |
Subject:Re: JADE SPEAR HEAD
Posted By: Paola Di Maio Fri, Dec 07, 2018 the specific gravity test may only work if the nephrite jade and metoerite in question have different specific gravity weight. for example, basalt from earth, and basalt from the moon can be told apart because they have different specific gravity (the one from the moon being a bit lighter) if however they coincidentally have the same sg then this test wont work. the only issue I have with the identification of the gemologist is that nephrite does not generally attract a magnet, while your specimen does, (of course there may be the odd exception) this alone would suggest further identification may be required. you may discuss this with the person who signed your certificate. there may be other tests, keep an open mind and the truth will surface, with time. |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Mon, Dec 10, 2018 Hi Paola, |
Subject:Re: JADE SPEAR HEAD
Posted By: Paola Di Maio Mon, Jan 14, 2019 OK, today I acquired a Jade BI disc and it has the Taotie motif on it , I only recognize it because of this thread. But the really important news is that many meteorites are misclassified as nephrites, that could be an issue. I have a cog (two or thre pieces) exactly like the one at the METROPOLITAN Museum in NY, and I know that they are magnetic and have green transparent bits in them, look at their tag: nephrite jade. I may need to publish some article in some journal. In the meantime if someone knows the curator at the MET please let me have their contact details . work to do folks!! |
Subject:Re: JADE SPEAR HEAD
Posted By: DANNY Thu, Jan 17, 2019 Hi Paola, |
Subject:Re: JADE SPEAR HEAD
Posted By: Paola Di Maio Wed, Jan 23, 2019 Danny |
Subject:Re: JADE SPEAR HEAD
Posted By: DANNY Thu, Jan 24, 2019 Paola, |
Subject:Re: JADE SPEAR HEAD
Posted By: DANNY Fri, Jan 25, 2019 Hello Paola, |
Subject:Re: JADE SPEAR HEAD
Posted By: Paola Di Maio Fri, Jan 25, 2019 wowowowo - beautiful piece of likely meteorite you got there- (tears in my eyes) |
Subject:Re: JADE SPEAR HEAD
Posted By: DANNY Mon, Jan 28, 2019 Hello Paola, |
Subject:Re: JADE SPEAR HEAD
Posted By: DANNY Wed, Dec 05, 2018 Hello PDM. |
Subject:Re: JADE SPEAR HEAD
Posted By: pdm Tue, Nov 20, 2018 I dont want to insist, but look at the Fukang meteorite, black with green patches. |
Subject:Re: JADE SPEAR HEAD
Posted By: Danny Sat, Mar 05, 2016 Correction on the weight of this spearhead. |
Subject:Re: JADE SPEAR HEAD
Posted By: DANNY Thu, Nov 22, 2018 SOME CLOSE UP PICTURES OF THE TAOTIE PATTERN ON THIS SPEARHEAD. HOPEFULLY SOMEONE CAN HELP TO SEE IF THE TOOL MARKS ON THIS PIECE WAS OLD OR MODERN. THANKS AND ALL COMMENTS ARE WELCOME. |
Subject:Re: JADE SPEAR HEAD
Posted By: PDM Fri, Mar 29, 2019 Danny, I need to contact you privately can I have your email address -mine is paola.dimaio#gmail.com |
Asianart.com | Associations | Articles | Exhibitions | Galleries | |