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About davidelevi

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    Ideal Diamond

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  1. davidelevi

    8,000 carat natural black diamond from africa

    Hi Joel, welcome to Diamond Review! I think the first thing you should do is to find a gemmologist (relatively) local to you and confirm identification as a diamond; then you can think about incurring the significant expenses involved in getting the stone to a first-rate lab (GIA has labs in Hong Kong, Taipei - 2 hours flight away) and graded. 100% gem species identification from photos is effectively impossible, but some things can be ruled out, and I for one have severe doubts that what you have in the pictures is a diamond.
  2. davidelevi

    Deciding on a Diamond - Need help!

    Definitely a good plan! Good luck, and let us know how you get on; hopefully you'll come out of the conversation with more answers, but if you have more questions instead, we are here to help.
  3. davidelevi

    Deciding on a Diamond - Need help!

    OK - so, looking at the example you just linked, here are three factors that will drive the price down: 1. Strong blue fluorescence (especially in a D colour) will depress price significantly. Whether that's 'relevant' to the aesthetics is a completely different question, but it will impact the price. We (on the forum) don't know if any of the first batch were fluorescent or not... but part of the difference may be there. 2. While this is an SI1, and the grade by itself will impact the price (meaning that the average SI1 will be more expensive than the average SI2, all else being equal), a much stronger price driver is whether the inclusions are visible to the naked eye. My bet is that the smattering of dark crystals under the table, reflected multiple times, would be easily visible and potentially bothering to quite a few potential buyers, hence a low(er) price. Again, we don't know whether the inclusions in the SI2s you listed in the first post are as easily visible or much less so. 3. Cavities - especially multiple ones - are definitely not a 'desirable' characteristic. They may not be a big issue in terms of durability or integrity, and here the larger ones are on the pavilion, which means they'll be less visible to a 'normal' observer, but they do depress the price. The question of cut is moot... the RC diamond seems to be an OK cut (and I personally like the shape), but the way in which the video is taken seems to be largely to show inclusions, rather than brilliance, sparkle and fire. Plus, of course, we don't have videos for the others to compare (to the extent that it is possible with videos taken by different vendors).
  4. davidelevi

    Deciding on a Diamond - Need help!

    Hm. Be careful. There isn't anything 'special' about the diamonds on Rarecarat (or on Blue Nile, for that matter), and that is a global market - if people are offering 'much better' prices for the same grade or 'much better' grades for the same price, something is amiss. (If for 'much better' you mean a difference of $4-500 on a $10k stone, then everything is fine, but differences of more than a few % are suspect).
  5. davidelevi

    Deciding on a Diamond - Need help!

    Prices seem fair. Bear in mind that synthetic/lab diamonds have a very different pricing structure (and that IGI and GIA colour and clarity grades aren't exactly interchangeable) The key is that you (and we) know nothing about the cut quality, but it's going to be the one attribute that most impacts the looks. There is nothing in the table you posted (and precious little in a complete GIA report) that tells you whether an oval is well cut. You need to see the diamond; ideally in person and comparing different stones next to each other, but at the very least in good quality photos and videos. I wouldn't say "you shouldn't" - the issue with clarity grading is that it is only roughly correlated with actual visibility of the inclusion to the naked eye and its aesthetic impact. I have seen VS2 that have an annoying black spot right under the table, and once you have seen it you will keep seeing it... and I have seen I1 (the grade below SI2) which seem perfectly eye-clean in most circumstances. So, the lower the clarity the more cautious you have to be, and the more the price is going to be influenced by the visibility of the inclusion... but that doesn't mean that SI2 or even I1 are 'bad' stones.
  6. davidelevi

    Knot in Diamond

    Good advice... if you can see the stone! Not always the case, even disregarding COVID-caused issues. This I don't particularly agree with. If the stone were cut using very old-fashioned proportions, it would not receive a cut grade of 'Excellent' or even be classified as a "round brilliant". If a stone's surface is marred by wear, it would not be graded 'Excellent' for polish (and/or it would have a lot more external characteristics such as chips).
  7. davidelevi

    Can't choose between 2 Stones

    It's not that simple, but it's not that complicated either. Depth as such doesn't tell the story, but a stone with a higher crown and a narrower table will probably be more fiery (and probably less bright) than one with a shallower crown and a broader table. It will also tend to be deeper, in as much as the crown height is part of the depth - but "greater depth" alone could mean a steeper pavilion or a thicker girdle as well as a higher crown... neither of which does anything for fire (or brightness, for that matter). This said, the crown angle has to work well with the pavilion angle so that light is reflected back to the observer's eye and not lost through the stone (very shallow pavilion) or at an angle rather than directly back (very steep pavilion), so again a bulky crown by itself is no guarantee of a fiery stone either.
  8. davidelevi

    Looking for opinions on this oval I recently bought

    Really glad you found something you like! Congratulations! On a round, pretty much always. On an oval it depends on the shape of the setting and where GIA has placed the inscription, but very likely yes. I can't recommend anyone in Utah, but the one piece of advice I would give you is to ignore CAD renderings and fancy websites. and focus instead on seeing the actual work that people have done - preferably by seeing and handling the pieces in person, but good quality photos are a good start if "live" inspection is impractical. Look at how careful the finish on a piece is - how much attention has been paid to hard-to-see areas, and how much attention has been paid to design: making a piece that is beautiful, robust and light to wear. Find someone that gets these two things right, and you are in a good place.
  9. davidelevi

    The beginnings of a hustle

    Can't really offer too much insight on the US secondary market - other than to say that places like Facebook Marketplace and Craigslist seem to have become more popular than eBay... All is well here (for me and my family, at least - my wife and I got the second vaccine shot yesterday) - hope the same for you!
  10. davidelevi

    Buying an engagement ring noob

    Looking forward to seeing what you think when you get it - and huge congratulations for what's to come!
  11. davidelevi

    Buying an engagement ring noob

    It can - but there are two issues: 1) the shallower the engraving is, the more easily it will fade in normal use, and 2) no matter how shallow, erasing it will result in the metal getting thinner. It doesn't require a "special" tool, just a small grinder (like a Dremel). The sizing issue for me is the "killer" - having an engraving will make the sizing job more difficult, and/or can result in the engraving being partly or totally erased during polishing. Your idea of waiting and doing the engraving locally sounds like a better solution.
  12. davidelevi

    Buying an engagement ring noob

    Well, it's a nice rendering... which means nothing. CAD processing is cheap; the cost is in the finishing, but the CAD itself tells you nothing about that. 😁 Pros: it's a way of making the ring more unique and "yours". And a puzzle for future generations: "Who was this mysterious X K? Nobody in the family with these initials!" Cons: no returns if you don't like it, and if it ever came to selling, it is a bit more difficult. A bit more cost. Fonts: whatever takes your fancy. Nowadays with laser engraving it's no longer a matter of relying on the skill of the local engraver who is really good at block letters, but bad at cursive script (or vice-versa).
  13. davidelevi

    Industrial Diamonds

    Hi Hugo, Not much I can answer there, unfortunately - except in very generic terms. One thing I can say is that since the amount of synthetic industrial diamonds is much greater than the natural (mined) production, most of the 'rules' and network of a jewellery forum are likely to be quite irrelevant. A bit of searching turned this up these reports: https://www.grandviewresearch.com/industry-analysis/industrial-diamond-market https://mcgroup.co.uk/researches/industrial-diamond https://www.transparencymarketresearch.com/industrial-diamond-market.html https://www.industryarc.com/Report/15899/industrial-diamond-market.html https://www.coherentmarketinsights.com/ongoing-insight/industrial-diamond-market-1946 https://www.researchandmarkets.com/reports/3772941/europe-industrial-diamonds-market-and-the-impact which all provide some modest background (and occasionally a free sample of contents ). Whether that is enough or you want/need to spend several $1,000 to get full access, only you know!
  14. davidelevi

    Some diamonds expert please help me, thank you!

    Hopefully at least a story with a beginning, a middle and an end... but given the rest of your posts, that's possibly too much to ask.
  15. Yep - between a knot and a cavity on the crown, I'll take the knot. Definitely not - unless the alternative is a gaping cavity.