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  1. Texas Leaguer

    Should we discourage or recommend FL stones?

    David, It is not so much a matter of "proof" of any one argument as it is gaining a solid understanding around the topic. From there better insights can be gleaned about the observations being made. It is not my job for instance to "prove" that you are not seeing what you say you are seeing...
  2. Texas Leaguer

    Should we discourage or recommend FL stones?

    @Rockdiamond , As you well know from having been an active participant in many discussions on this topic, there is plenty of science discussed and referenced in various fluorescence threads on this forum -some are linked in this thread. I am not sure what your goal is here, but anyone truly...
  3. Texas Leaguer

    Should we discourage or recommend FL stones?

    Strong fluorescence can make a diamond look hazy and oily. However, if a diamond has compromised transparency in EVERY lighting situation, there is probably something else going on. Graining, twinning wisps and clouds are the usual suspects. If haziness is present in lighting with insufficient...
  4. Texas Leaguer

    Should we discourage or recommend FL stones?

    David, I am really not sure what you are trying to accomplish in this thread. We have already agreed that the answer to your subject line is that we should not discourage or recommend fluorescent diamonds. We should instead educate. It is well established here that you feel that you have...
  5. Texas Leaguer

    Should we discourage or recommend FL stones?

    I did not say that David. Clearly it is possible to stimulate fluorescence if you place the diamond within a few inches from a UV tube light.
  6. Texas Leaguer

    Should we discourage or recommend FL stones?

    There is plenty of discussion already in the forum archives regarding the science (and myths) of fluorescence. The thread below goes on for 22 pages for anyone interested in taking a rather uneven journey...
  7. Texas Leaguer

    Should we discourage or recommend FL stones?

    You shouldn't take offense RD. You started the thread and asked for everyone's thoughts. When you say you are questioning the science, exactly what science do you think is in question?
  8. Texas Leaguer

    Should we discourage or recommend FL stones?

    As @kenny suggests, the aim should be to educate, not persuade. But the science suggests very strongly that in the vast majority of indoor lighting environments there is insufficient UV intensity necessary to stimulate emissions. Therefore, most consumers will experience neither transparency...
  9. Texas Leaguer

    Should we discourage or recommend FL stones?

    That is of course a different device. A lux meter measures the quantity or brightness of light. You can have very bright light sources with no UV component.
  10. Texas Leaguer

    Should we discourage or recommend FL stones?

    To put in perspective the relative intensity of direct sunlight vs sunlight through a window vs overhead flurorescent lighting vs fluorescent desk lamp, I took the following readings this morning. In the direct sunlight photo the sun is lightly diffused by some high altitude clouds. On a...
  11. Texas Leaguer

    Strong Fluorescence - Opinions on Engagement Purchase Please!

    This is one possible critique of the study. The authors state it was a relatively small sample size due to the difficulty of culling sets of stones with similar attributes but differing fluoro levels. And although they did use multiple lighting environments, none was direct sunlight. It is...
  12. Texas Leaguer

    Strong Fluorescence - Opinions on Engagement Purchase Please!

    I have enormous respect for GIA, but count me among those trade people who @TODiamonds referred to as not buying into those figures, based on my observations over several decades in the business. However, the devil is always in the details and the design of the studies that GIA bases these...
  13. Texas Leaguer

    Strong Fluorescence - Opinions on Engagement Purchase Please!

    Nice job on the video clip. The diamond does not appear to have a milkiness issue. Very pretty.
  14. Texas Leaguer

    Strong Fluorescence - Opinions on Engagement Purchase Please!

    The probability of observable haziness or milkiness due specifically to fluorescence is proportional to the strength of the fluorescence, such that strong or very strong might exhibit this effect whereas medium or faint are extremely unlikely to do so. It is not necessarily a binary “yes/no”...
  15. Texas Leaguer

    LGD Man Made diamonds are going to change natural diamonds for the better

    I don't think it is particularly enlightening to think of "millenials" as some sort of monolith. Yes, there are trends and new preferences and sensibilities - there are with every new generation. But the cohort is complex and diverse and they are always influenced greatly by an older...
  16. Texas Leaguer

    Opinions in this 2.4 carat please

    Transparency issues can be subtle. Best practice is to compare the test stone side by side with another stone of similar size, color and cut quality in a VS1 or above clarity. Any significant transparency problem in the test stone will become apparent.
  17. Texas Leaguer

    Diamond choice dilemma

    This is not really how the business works. There is more to this story. I would keep asking questions.
  18. Texas Leaguer

    Am I being ripped off?

    Shopping for diamonds in the lower clarity ranges can be a good way to get excellent value. But pay close attention to the report. The grade setting characteristics are listed first under keys to symbols. If the stone has potential transparency reducing features such as twinning wisps...
  19. Texas Leaguer

    Need Help Deciding on Princess Cut ASAP: 2 Stones on Hold

    Not sure which video you are referring to but there is a technique for cutting princess with very small facets placed directly on the points - referred to as "chamfer" corners.
  20. Texas Leaguer

    Need Help Deciding on Princess Cut ASAP: 2 Stones on Hold

    We offer our A CUT ABOVE Princess in 2 and 3 chevron facet configurations. Both have gone through the ray tracing light performance grading system of the AGS without deduction so there is no deficit in brightness, contrast or fire. The more facets you put on a diamond, the smaller the virtual...
  21. Texas Leaguer

    What sales tactic raises concern for you?

    "an excellent resting skeptical face" :lol: You paint quite the picture @CSpan
  22. Texas Leaguer

    Why local jewelry BM stores offer a lower price than internet GIA diamond?

    @4Moonlite , Si2 is a pretty wide category. The local store owner may be intending to pick the cheapest ones available in order to be price competitive. This may not be in your best interest. It may be better for YOU to be doing the choosing, even if it means a slightly higher price.
  23. Texas Leaguer

    What sales tactic raises concern for you?

    Thank you @Tartansparkles . No, we currently do not have any public facing messaging to that effect. But I think it is a very good idea!
  24. Texas Leaguer

    What sales tactic raises concern for you?

    This is a conundrum for us! :oops2: We have a consultancy style approach. Since nobody is on commission here we take on the role of customer advocate. So our 'selling' is geared to making sure the customer is fully informed about our products, services and policies, and that we gather all the...
  25. Texas Leaguer

    SI1 Clarity in Larger Carats

    I'm not sure I buy into the argument of grade creep. I do think the internet has made the trade have to take a more disciplined approach to communicating to customers the degree to which a diamond has inclusions visible to the naked eye. And over time, this can have an impact on perceptions of...
  26. Texas Leaguer

    SI1 Clarity in Larger Carats

    Indeed. Things like graining and twinning wisps also have the potential to scatter light and diminish transparency. Like cloud inclusions, the mere fact that these features exist in the stone does NOT mean that light performance will be appreciably affected. It just means they must be...
  27. Texas Leaguer

    SI1 Clarity in Larger Carats

    While you are throwing out what you've read, you can add the bolded to your stack. In our operations we regularly find Si1's that have diminished transparency. It is one of the things we specifically screen for. It is often very subtle and would not be picked up by casual observation. An Si1...
  28. Texas Leaguer

    Diamond Help Needed Please

    Certainly not anything that would be obvious. This is a good example of a "near miss" for A CUT ABOVE. Some asymmetries only manifest themselves clearly in static images. In this case, very slightly. When you consider the dynamic nature of diamond light performance and binocular vision, some...
  29. Texas Leaguer

    Diamond Help Needed Please

    We did re-image the stone today and confirmed that the original images are accurate. The stone has a very slight amount of 3D asymmetry. It was for this reason that it did not make A CUT ABOVE.
  30. Texas Leaguer

    Diamond Help Needed Please

    Thanks for the call out @sledge . It is worth re-imaging that stone to see if it might have been slightly tilted at capture. It's the weekend, but I have notified our photo dept and would expect them to be able to have new images by end of day Monday.
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