Hmmm … “16 carrots” ? Carrots Definition & Meaning - Merriam-Webster
What standard was used to arrive at a Hardness value of “10” ?
What is “good” Thermal Conductivity in comparison with extreme Thermal Conductivity?
It is painfully obvious that the Clarity does not equal FL (Flawless).
Just my observations from within your posting.
I have Diamond selector II and it shows 10 as hardness and the diamond tester shows good thermal conductivity as diamond
further the stone is comparatively harder than corundum
The Stone is well trans loosen and there is hardly any inclusions
Being as kind and respectful as I can … You need to study a little more English, as words do have meaning; and a lot more gemology (science of gemstones) and metrology (science of measurement). The Diamond Selector 2 is a low quality made in China unit known for false positives. It doesn’t measure Mohs hardness on its painted on scale. It gives a relative Thermal Transfer score which depends on accurate calibration with a natural diamond to avoid false positives. Again, you are observing Thermal Transfer characteristics of your stone under test and NOT its Mohs hardness level utilizing the Diamond Selector 2 device. “Trans Loosen” in your sentence probably means Translucent. A stone must be TRANSPARENT in order to even have a chance of being IF (Internally Flawless in regards to Clarity). Again, words do have meaning.
That is certainly NOT what you have. The Largest known natural red diamond rough weighed 13.9 carats (finished polished weight was 5.11). Moussaieff Red Diamond - Wikipedia
Keep studying … you’ll get there.
you points are well put…takes a lot of study and experience to know gemmology… it’s a science.
have to know about chemistry and physics…to understand optical properties and physical properties, crystallography of gemstones. cheap testing equipment without know their action and limitations will be decieving!
Understanding color is even harder… trace elements, crystal field splitting, lattice dislocations…quantum effects.
Far from it… to know things truly well, I would need to go back to school as a nontraditional student and relearn chemistry, physics, and progress to advanced math. Sitting in on the geochemical society lectures, where I am right now (annual Goldscmidt joint international and european geochemical societies— all PhD stuff, by professiona geologists) I can follow the gist of the information being presented, and occassionally the details, but the devil is in the details… doing the actual work is another matter… I took 2 semesters of inorganic chemistry, 2 of organic chemistry, 3 calculus and 3 of physics… some of it is retain but only in the context of what I have used daily…the rest of the details have been long forgotten as it was 50+ years that I was in undergraduate college preparing for an advance professional degree… thinking seriously of returning to school and doing a degree in geology as a non traditional student…I would have to start from scratch and relearn college algebra to rebuild my skills…my professional work was medical and medical science… entirely different from the physical sciences, yet still bound to the same scientific principles and methodology and standards… critical thinking and being able to evaluate scientific literature is a must… 10% of all scientific literature, by meta-analysis is “junk science”…being skeptical is a must also… people buy equipment without knowing how they work and what the limitations are… gem testers are based on thermal conductivity…good for diamonds and silver which have very high thermal conductivities… cheap testers will have difficulty with other stones… particularly those that have similar conductivities, which include most of the silicate gems and minerals…measuring SG can be done at home as royjohn instructed… the caveat is that the balance must be sensitive and well calibrated… a home scale has to be sensitive down to 0.01 grams… nothing less will suffice… people need to know what they’e doing, how to do it properly and what limitations there are before they start posting.
I have read this posting. Steve I believe Michael was trying to give good advice. I also believe the both you are truly knowledgeable about the science of gemstones and I have learned from reading this thread. the way the question was asked with the picture accompanying your question Michael was trying to give to give an honest answer base on the information. I wish this conversation would have ended differently.
I am a new member to this group with deep respect Paul
MHutton is a professional and he is very knowledgeable, someone’s whose opinion should be respected. My interest comes from a different perspective- it’s geological… However, gemmology also is a science as well as an art. Part of the GIA’s mission is to bring scientific gemmology to the table. Gemology can be learned without an advanced degree. But it takes a lot of experience and study to become knowledgeable. Pictures are always impossible to evaluate without physical and optical properties. Thermal conductivity testing is a screening test. Diamond and Moissanite will have the highest thermal conductivities of all gemstones and simulants. Thermal conductivity testing for silicate gems is not very reliable…variations between silicate gems are like splitting hairs…thermal conductivity bands are too narrow and scrunched together so that even a very sensitive machine will have trouble distinguishing between them… you will get a list of many possible minerals with nearly the same reading… Calibration of a tester is very important… testers should be recalibrated at regular intervals if used regularly… Testing Moh’s hardness is easy… but it is destructive in that it makes scratches. If you have a rough diamond, nothing other than another diamond will scratch it…, which also includes diamond coated knife sharpeners…Carborundum in grind stones and knife sharpeners has a harness of 9.25… a diamond won’t be scratch by a cheap hardward store carborundum knife sharpener. Similarly, tungsten carbide which is used on sawblades has a hardness of 9 -9.5… Aluminum oxide sharpers and grindstones have a hardness of 9… same chemical composition and hardness as sapphire… diamond will not be scratched by sapphire or aluminum oxide grindstones. I mention these sharpeners as they are cheap and readily available everywhere… no need to have a real/synthetic sapphire hardness stone to do the scratching. Hardness 8 is topaz, but a cheap cubic zircornia has a hardness of 8 to 8.5…quartz is ubiquitous with a hardness of 7…
The point of all of this is that you can build your own hardness testing kit by buying cheap materials from hardware stores which are available everywhere…
When I did jewerly as a hobby, I always was looking for ways to save money…by using readily available materials I saved time on shipment orders and money.
Testing specific gravity is also an easy home project… a very sensitive balance beam scale is what is necessary… calibration has to be done frequently also… Royjohn has posted how he makes them work…
The next test would be refractive index… There’s a lot of cheap refractometers on sale, most of them work well enough. HOW to use them properly is the key to getting a good refractive index.
The last but not least which unfortunately is rarely avaiable, is the provenance of the stone…knowing where the stone comes from gives a great clue as to what it could be and the range of possibilities…If a stone can be certified to come from a single mine, that is the ideal…however nearly all of the time, sellers don’t know where they came from…If you dig them up yourself, then you know where it came from…the geology of the origin of the stones goes a long way in limiting what possibilities a stone is…
If you have a refractive index, hardness, and specific gravity, these properties along with the pictures of your gemstones will go much farther in helping others identify your stones.
Just as an aside: I really love the diamond coated knife sharpeners sold for $12-$13… they cut into carbon steel and stainless steel knives much faster than using aluminum oxide whetstones… you get a very sharp blade very quickly!..
Looks like a blob of natural or synthetic corundum. If not transparent then not worth faceting, and only cabbing as a polished specimen. The origin would indicate its composition. If provenance is not known and you have been sold it as diamond I suggest you try and get your purchase price back as soon as possible.