Hi,
I'm buying a diamond in Japan and wanted to know if anyone knew anything about the grading labs in Japan, and any details about the hearts and arrows cut. It's really hard to get any specific information because it's not usually in English.
Although they do have GIA grading reports for some diamonds in Japan, there are few that you can actually see in a store that have the certificates. Most are graded through japanese labs.
So after doing lots of reading, and then lots of looking at different stones, I went with this one:
0.571c, H colour, S1, but the cut is called "Hearts and Cupids" which is something like the "Hearts and Arrows" or Eightstar. It cost about US$1800 from a shop who primarily does engagement rings.
For cut, they have this strange grading system that goes from poor, fair, good, very good, excellent, "hearts and cupids", and "hearts and cupids triple excellent".
They actually showed me the pattern under a hearts and arrows viewer and I could see it very clearly. Using their viewer I could see the slight imperfections (assymetrical shapes)in the cut, but the pattern was very sharp. In fact, using their viewer, the pattern on the diamond I wanted was only rated "hearts and cupids" but looked clearer than the next grade up "H&C triple excellent".
I've heard that even having hearts and arrows doesn't actually guarantee an ideal cut, but it must mean that the stone was at least cut carefully right?
The place doing the grading report is called the "Chuo something something" in japanese, and in English, is called the "Central Gem Laboratory"
(http://www.colorstones.com/labs/labjapan.htm)
I have a deposit on the diamond and will pick it up assuming that everything's good. They didn't have very good lighting in the store, and although I'd been able to pick out VS1 defects at other stores with a 10x loupe, I couldn't find the defects in this one. They told me that they didn't have a microscope because only diamond cutters needed them (which I know is total bull$&!t
), so I spent a fair amount looking for defects but came up empty. I'm wondering if it's slightly too good to be true, and that maybe they'd done some kind of clarity-enhancement. They pulled a few tricks I didn't like, such as having a list price of double the selling price so that they could give you a 50% discount. But, ignoring that, I still thought they had the best stone for the price.
So has anyone ever bought a diamond in Japan and know about the hearts and arrows cuts they use here? And just in general does it sound like a good deal? It's hard to exactly compare because almost everything is more expensive over here than in other countries.
I'd really appreciate any comments at all, even if you don't know all the answers to my questions. It's a bit overwhelming shopping for something like this when you can't speak the language properly.
Thanks a lot.
PS: The information on these pages has been great for learning all the background stuff (4C's etc)
I'm buying a diamond in Japan and wanted to know if anyone knew anything about the grading labs in Japan, and any details about the hearts and arrows cut. It's really hard to get any specific information because it's not usually in English.
Although they do have GIA grading reports for some diamonds in Japan, there are few that you can actually see in a store that have the certificates. Most are graded through japanese labs.
So after doing lots of reading, and then lots of looking at different stones, I went with this one:
0.571c, H colour, S1, but the cut is called "Hearts and Cupids" which is something like the "Hearts and Arrows" or Eightstar. It cost about US$1800 from a shop who primarily does engagement rings.
For cut, they have this strange grading system that goes from poor, fair, good, very good, excellent, "hearts and cupids", and "hearts and cupids triple excellent".
They actually showed me the pattern under a hearts and arrows viewer and I could see it very clearly. Using their viewer I could see the slight imperfections (assymetrical shapes)in the cut, but the pattern was very sharp. In fact, using their viewer, the pattern on the diamond I wanted was only rated "hearts and cupids" but looked clearer than the next grade up "H&C triple excellent".
I've heard that even having hearts and arrows doesn't actually guarantee an ideal cut, but it must mean that the stone was at least cut carefully right?
The place doing the grading report is called the "Chuo something something" in japanese, and in English, is called the "Central Gem Laboratory"
(http://www.colorstones.com/labs/labjapan.htm)
I have a deposit on the diamond and will pick it up assuming that everything's good. They didn't have very good lighting in the store, and although I'd been able to pick out VS1 defects at other stores with a 10x loupe, I couldn't find the defects in this one. They told me that they didn't have a microscope because only diamond cutters needed them (which I know is total bull$&!t

So has anyone ever bought a diamond in Japan and know about the hearts and arrows cuts they use here? And just in general does it sound like a good deal? It's hard to exactly compare because almost everything is more expensive over here than in other countries.
I'd really appreciate any comments at all, even if you don't know all the answers to my questions. It's a bit overwhelming shopping for something like this when you can't speak the language properly.
Thanks a lot.
PS: The information on these pages has been great for learning all the background stuff (4C's etc)