- Joined
- Nov 16, 2003
- Messages
- 645
TL, et al,
For years spinel existed pretty much as a dealer's stone, only dealers were interested, the public was not. Perhaps this is because colorless spinel was used as a diamond substitute in the 19th Century and that "substitute" idea held on. Spinels were graded pretty much like tourmaline, as look-alike stones. A red spinel was graded by how close it resembled ruby, blue spinel, as sapphire and so on. Now, with the Mahenge material and the so-called cobalts from Sri Lanka (which hardly existed in the market 10 years ago) the light bright reds and the light bright blues are coming to the fore. So, should still be some good deals out there while the market re-calibrates.
Loving Diamonds, I was referring to the images posted by VapidLapid, I believe. You make the point that grading is "subjective" that means there are no objective criteria? Yet, you talk about gray, isn't that an objective criterion? You are simply wrong here. Hue/saturation/tone, cut, clarity eye clean, VVS, etc.), crystal are all definable, objective criteria. Logically, if there are no objective criteria, grading is impossible.
The crystal of the sapphire is smoky. Pretty common in sapphire, the hue is pure blue. The grade is based on the pure blue day color and the pure purple night hue. Again, you are telling me how an image looks on your monitor. You are talking about an image, I am talking about a stone.
Best,
For years spinel existed pretty much as a dealer's stone, only dealers were interested, the public was not. Perhaps this is because colorless spinel was used as a diamond substitute in the 19th Century and that "substitute" idea held on. Spinels were graded pretty much like tourmaline, as look-alike stones. A red spinel was graded by how close it resembled ruby, blue spinel, as sapphire and so on. Now, with the Mahenge material and the so-called cobalts from Sri Lanka (which hardly existed in the market 10 years ago) the light bright reds and the light bright blues are coming to the fore. So, should still be some good deals out there while the market re-calibrates.
Loving Diamonds, I was referring to the images posted by VapidLapid, I believe. You make the point that grading is "subjective" that means there are no objective criteria? Yet, you talk about gray, isn't that an objective criterion? You are simply wrong here. Hue/saturation/tone, cut, clarity eye clean, VVS, etc.), crystal are all definable, objective criteria. Logically, if there are no objective criteria, grading is impossible.
The crystal of the sapphire is smoky. Pretty common in sapphire, the hue is pure blue. The grade is based on the pure blue day color and the pure purple night hue. Again, you are telling me how an image looks on your monitor. You are talking about an image, I am talking about a stone.
Best,