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Windows of DOOM!: How They Ruin Your Gemstone [Gem Buyer's Guide]
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- čas přidán 17. 08. 2024
- If high clarity is good, why is "window" bad? Several astute friends of the channel have asked this question, and in this video I seek to answer. With visuals!~
Check out the companion article for this video on my website gemshepherd.com under "explore" where you can explore other topics in gemology and investing in gemstones.
![Lighting Conditions [Gem Buyer's Guide]](/img/n.gif)
This is in my opinion is the most crucial factor when it comes to buying gemstones .. AND .. your most important fantabulous video to the Schmucks in the world!
Thanks for the high praise 🙏
Thank you Peter for your good entertaining videos. You make learning about gemstones interesting & fun. You may have heard “If you can't explain it simply, you don't understand it well enough.” This is a quote attributed to Albert Einstein that I immediately thought of when I saw your videos.
"You surely explain small things in a great way".
High praise indeed. Thank you John.
Thank you Peter, very very well delivered content as always. I just discovered your channel today and it's a really superb source of information for beginners like myself!
I'm very glad to hear that you enjoy my work Xeenslayer. May it continue to serve and may the new content be of value to you aswell!~
I wondered this myself! Thanks for another fun and concise video.
My pleasure Gavin ~ glad I could scratch an itch for knowledge.
I actually enjoy this channel. Keep making videos.
Thanks Steven ~ more to come in the days ahead.
As usual a fun but also a very informative video. Is not another good method of determining if a gemstone is windowed to put it on a piece of paper over text and if you can read the text it is a clear indication of windowing?
Hi Don ~ windowed stones will OFTEN allow for text to be read through them, but I wouldn't use this as a definitive test. Some stones like diamonds refract light so intensely (high RI) that they dont have the "read through" effect. I havn't seen too many large, windowed diamonds, so im not sure how strongly this property would affect larger stones.
The important thing to keep in mind is that when you view the stone inverted, light is approaching the stone from different angles, and so the path light travels will be different than if the stone was right side up. This directly affects whether or not light is able to punch into the stone. It would be interesting (for nerds like me) to run an experiment on your idea though.
Thanks for the question~
Thank you very much for all that. Can you talk a bit about other spinel colors, price and color? I thank you very much.
My pleasure - glad you enjoyed. Spinel is a wide topic, as there are a host of colours and huge variation in prices. I'll keep it in mind as i'm planning new episodes, thanks.
Your beard and your character both are beautiful.
Aw thanks~ you're too kind.
In darker more saturated colors, if extinction is evenly spread out throughout the small facets of a stone, I actually appreciate it more, because it makes the rest of the stone seem brighter. However, if it's a giant chunk of black, it looks terrible. (And I dislike windows no matter what)
I'd say were of a like mind. I can tolerate a certain amount of extinction much more easily than window. Soul sucking holes.
Agreed. It looks the worst when you have your shirt showing through.
super informative. thank you
Glad to be of service, Jessica~
Good video! Thank you!
Thank you, Aaron~ glad to be of service.
important video
Thank you
where you from
Thanks! So much information with clear explanation.
I STRIVE to make it clear. I can ramble about many things, but I have to STRIVE to condense it in a way that is consumable and useful to people XD Hopefully i'll continue to get better at this.
always, very informative and very nice video ! gr from belgium Tony
Thank you, and glad you enjoy Tony~ HI from Thailand :D
Hi, have what I think is a 20 caret Imperial topaz. Where can I sell such a gemstone for a reasonable price, or any other gem stone for that matter?
Reasonable price is a concept up for debate, but I think you will find the greatest success in selling gemstones by cultivating relationships with clients that appreciate the qualities of what you offer. "The Market" is much more than a location.
Oh if only I had learned that earlier! I definetely own too many windowed stones.
Is there a perfect pavilion angle for every mineral?
The pavilion angles are directly connected to the refractive index (RI) of the stone. Experienced cutters typically have some awareness of what angles they need to use for which minerals (as minerals typically have a defined RI range).
Always good videos. Thanks for work
Thank you Zarbi Bazar ~ my pleasure to serve
Aha your beard gives you away!
Ummm ok I can’t say more w/o being socially wrong. Any way. I like the beard and you are a wonderful instructor,I thank you Sir.
I love everything about gemmology!
Thank you
Thanks ~ I'm glad you enjoy the beard and my content aswell ^_^
All can change when its fitted in jewellery. 🤗
When stones are too dark they wont be that much shining.
Stones can wake up or die in jewelry, absolutely.
Well said.
Thank you George ~ I strive
Thanks for informative and good videos.
My pleasure~
A question, are all stones cut by computers now, never by humans?
Also I heard before that it’s possible to grow emeralds,like you have to start with a small real emerald and put it in a machine that applies atmospheric pressure to it….and it grows? Is that true?
HI ~ most coloured stones are cut by humans actually. I have seen automatic machines that cut calibrated (uniform size rough with identical cutting designs) but with stones of larger size and value, experienced human cutters are more appropriate because they evaluate the rough and determine the best way to cut for beauty as well as maximum yield, which is something machines are not yet capable of. Aesthetic being something that isn't mathematical or logically quantified, its arguably one of the most important places for human workers.
On the emerald issue ~ thats partially true. There are two major methods for creating synthetic emerald, and they do start with seed crystals in a nutrient rich solution at high heat and the various processes basically cause the nutrients to deposit on the seed crystal and grow in a way that mimics nature. Fascinating stuff, though definitely distinguishable from natural emerald if you are proficient with a loupe and have seen enough samples.
@@GemologyforSchmucks oh Thank you for answering me and so quickly! That’s so great to hear that expert cutters still do the cutting a lot of times. I think I got that information from a CZcams video hosted by the owner of a Diamond mining business in South Africa. He was utilizing computer robotics handling laser technology just to make the specific cuts that he would have blue printed out. The blue print and raw stone was then given to a human worker who would load it into the machine. I should have known when he was saying it’s only done like this now, I thought that sounded kind of extreme. He is only handling his own diamonds and he said it’s computerized so it cuts down on errors happening and the loss of expensive product. I can see how that could make sense for his situation,but as you said probably not so cost effective for semi precious stones.
That’s amazing about the emerald “gardening”, so cool that it’s true. I think it’s only emeralds that do it,because they are sedimentary stones? Is that right? But I was curious then,how much is the big pressure machine? And what’s that electric bill look like? Thank you again you are so knowledgeable,yet relatable! Really zinger!
Yes and first and foremost in my mind I think it’s the human artistic handling and the whole high pressure feeling that inevitably must occur when a master is cutting a stone. I love it, all of it so far, there probably are some down sides that I haven’t thought of yet, but I’m really thinking of going through the schooling to become a gemologist!! Thank you for being such a great teacher!
@@HawSnowwhite For emeralds the they're more like an oven than in some senses. The thing that makes them so expensive is that the crucible that the emeralds are grown in is typically made out of platinum or gold, which naturally contributes to a super high startup cost. Then add onto that maintaining high temperatures for MONTHS or even over a year for some companies/stones in order to get your first saleable products. Electricity bills ain't no joke. I haven't seen the bills myself, and I'd prefer not to ever have one in my mailbox waiting to be paid XD
Thank you again for answering my question. I was wondering with the man made emeralds, what is the clarity like on them? Idk why but I would think it’s not great.
I was wondering if you know how much diamond cutters get paid?
I live in Hawaii on Oahu,and I learned there is only one diamond cutter in the islands. It’s a woman and she lives here. So I was just wondering is it a flat rate, or hourly? Just a ball park figure if you can, I won’t hold you to it.
Do you have a chart that shows the proper dimensions for faceted gems? I'm quite the noob. Also is "Schmucks" a play on the German word for jewelry?
I don't have a chart ~ sorry. Gem cutters get acclimated to "depth percentages" when they plan out their cuts, and the rest of us that buy already cut gems simply look to see if the stone has window, and determine if we think there is enough depth for a proper recut to close the window.
And the "...for Schmucks" thing was a Yiddish reference that I enjoy very much. I found out as a happy accident that in German it has a different (but convenient for me) meaning from the Yiddish usage.
Can i make the following assumption... a dark color/tone (of lets say of a ruby) would increase the "window" effect and consequently diminish the "fire" effect ?
Its a logical thought, but the short answer is no. Window is caused by a lack of reflection within the stone due to improper angles of the facets, so light just punches through the stone. This is what makes the stone seem darker, but it's not the crystal itself that makes the stone dark. Some stones, even if they're cut properly will look dark because of the crystal. Fire/ scintillation is also usually connected more with the quality of the cutting, but sometimes it can be diminished by overly dark crystal, so you would be correct on that part in some cases. Over-absorption of colour in some crystal can make certain stones look lifeless (common in some garnets and certain sapphires #inky)
Excellent topic…
Thanks Dan. Its something I wanted to lay out as clearly as possible, because I had no idea what a window was until about 70% of the way through my gemology program. The aesthetics of a gem don't have so much to do with identifying what a gem is, or its potential treatments etc XD Aesthetics DO however have a lot to do with price, HAH!~
Awsome video
Thank you William~
💎💎
Seen your website and only boring diamonds sadly.
Help me understand if this is sarcasm or something. I speak only about coloured stones on my website gemshepherd.com, so perhaps there is some confusion, or a joke that I am ignorant of.