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Discussion in 'Colored Gemstones' started by LD, Apr 15, 2012.
by SPSGuy » Sep 10, 2014
Excellent post, the detail of purchasing a stone boggles the mind.
by cutratediamonds » Nov 11, 2014
Very good post..!! Helpful for the newbies..
by Trademan14 » Dec 1, 2014
Wow!!! Very helpful, thank you so much for this informative post!!!
by amazingAkj » May 22, 2015
Hey chrono, can you post pictures of whatever you have mention in your post so that it will be easy to recognize?
by chrono » May 22, 2015
Can you please be more specific? I've posted a lot of things. I do try to post links to studies/papers wherever possible.
by Abzurd » May 23, 2015
Hi, I'm new to the world of coloured stones. During recent travels been exposed to tourmaline and emerald and decided I will learn and maybe create opportunity out of what has presented itself to me... Learnt a fair bit already in a short space of time...
by LD » Jun 12, 2015
Abzurd - I'm glad to hear that you're enjoying the learning. Actually you'll find that won't stop because there's always new things to learn (especially about treatments) to keep us on our toes! We can't relax!
by chrono » Jul 23, 2015
Gem lab listing
AGL is the top choice.
GIA is also good.
SSEF, Gubelin and GIA are the top choices.
Chris Dunaigre, GGTL and GRS are also good.
SSEF, Gubelin (mobile lab), Lotus Gemology and GIA are top choices.
For all else, as long as they aren't corundum (sapphire or ruby) which requires better equipment = AIGS, GIT, Burapha, Tokyo Gem Lab, Emil Gem Lab, Nanyang Gem Institute
by userangl28212003 » Jul 23, 2015
Doesn't AIGS have better equiptment now for testing rubies and sapphires?
by Niel » Jan 9, 2016
I see grs used more than I used to. Is it just that it's uncommon in the US? Or is it really better outside the US than in?
by Johndev478 » Jan 24, 2016
Wow, what an informative post. Really helpful for those who are new to buy gemstones. Much more important things are described here. I bought amber stones from "Drfinejewels.com",which is a good wholesaler company registered in the Dominican Republic. There you can find all type and color of stone. Thanks a lot.........
by garyhsu » Jan 28, 2016
by LisaRN » Feb 3, 2016
Great Post! I would like to add some red flags that need to be investigated by potential buyers.
1. Any color described as "deep". May actually mean "very dark."
2. Any seller who does not fully answer your question. For example you ask "Does this spinel black out in sunlight?" They respond with "The spinel looks best under artificial light as most spinels do but I think you will will love this stone." If they do not answer your question then consider this a red flag.
3. "Sleepy" stones. This is usually used to describe a stone with micro inclusions that will "glow" under sunlight. However, if a stone is sleepy and not well saturated it may be a lackluster stone in sunlight. Ask for photos under multiple lighting conditions and make sure the seller has a return policy.
4. A great return policy does not mean a true representation of a stones by a vendor. For example- many pics and videos can be manipulated to show the stone at it's best. A seller can gain great feedback because they have a good return policy when the buyer is relieved that their return was accepted. If you get burned once (for example your pink or blue stone turned out to be grey) please be kind enough to give honest feedback.
by AandCGemTradingCorp » Mar 6, 2016
Wow! Being new to this forum, I found this to be the most complete and sage advice that anyone could read! I would only add one more piece of advice, to trust your own instinct- both about what you are looking at and who you are dealing with- your instincts, combined with this wonderful advice, should bring you to happy conclusions in a most difficult arena!
by Nicolette » Mar 29, 2016
I'm also new. After reading the whole thread filled with great advice, I'm not sure I want to jump into 'any' stone now I think I'm going to continue searching and comparing for a bit longer. Thank you.
by chrono » Apr 6, 2016
There are several here in the Coloured Stone forum who are dabbling with buying rough for a custom cut stone. I thought this might prove useful or at least informational.
by chrono » Apr 13, 2016
Excellent link to guides on how to use gemmological tools, pulled together by Marlow.
by Lily-love-gems » Jul 9, 2016
by Razz » Oct 29, 2016
Another big thank you from another newbie here. I used to shy away from purchasing colored stones, but now I feel a little more confident in taking the leap into the technicolor world. Thanks for the helpful information.
by DeNice67 » Feb 7, 2017
wow Thank you! So much information, I am almost overwhelmed Thank you all. Its awesome to find a place like this where we can learn before we buy. I am looking at buying a Spinel, I love them! I am learning a lot but if there are direct tips to give me before I purchase my dream stone. I would appreciate it. I am learning to look by mm size instead of ct size. Correct? They seem to be bottom heavy? I attached the color....... no one in the stores in St. Louis suggests I buy one, and I don't know why also the fact that they don't carry them anywhere in my area, means I need to order. That is scary. But I am researching my butt off. Input?
by DeNice67 » Feb 7, 2017
ok I found another forum from 2012 that had a lot of answers. I searched "Spinel" and I found a lot of info. I am new here, and didn't know how to do that. You guys are probably sick of Spinel questions.
by minousbijoux » Feb 7, 2017
DeNice, it would be best for you to start your own thread if you want people to see your questions and respond.
by catsareawesome » Apr 4, 2017
Hello. New kid on the block here...thank you very much for the lovely information, I certainly learned a lot! I've always been attracted to "pretty rocks" when I was a lass, then got into jewellery making, much to the delight of my teenaged daughter. I'm learning a lot along the way and want to learn more about coloured gemstones and have so many questions, will keep reading...and learning
by Gems Smith » Nov 30, 2017
Great information you have shared here. Thanks for this.
by unsettled » Dec 2, 2017
What great (albeit overwhelming) information!