"Opal, if you don't know, is an incredibly beautiful precious gemstone that can take on all the colors of the rainbow."
"The more diamonds you guys see, the more you'll be able to tell the difference."
"Not knowing how rare it was miners used to extract the needle light just like any other gem."
"Despite their scarcity, constituting less than 0.2% of all mined diamonds, blue diamonds have forged an extraordinary reputation."
"Once you kind of learn which gems are actually going to be worth the most money."
"Tourmaline on quartz crystals, $29,000. Wow."
"Real diamonds won't show up on x-rays."
"What are diamonds? Where do they come from? And what is their story?"
"...opal is often fashioned into a composite gem to make it stronger... known as doublets or triplets."
"You can use it on any gem that you're looking for inclusions."
"The rarest type of rose quartz however contain trace amounts of phosphate or aluminum."
"One of the rarest is known as citrine quartz."
"Sri Lanka knows what's up when it comes to Sapphires. As many of you know Sapphire or corundum is aluminum oxide and the coloring agent dictates what type of corundum it is. Most of these colors are in the pinkish purplish range."
"The polariscope is absolutely essential for many cutters."
"The spectroscope can tell me without a shadow of a doubt if I'm looking at jade."
"Being able to magnify to 10 times magnification is absolutely essential for knowing truths about your stones."
"Crystal inclusions in rubies: nature's fingerprints preserved in stone."
"Fire agate has this iridescent across the surface."
"Tiger's eye can show you chatoyancy."
"You can in some cases pinpoint where in the globe this particular gemstone grew just because of a difference in either color or some slight size difference or inclusions or whatever, anything like that."
"So you've got good clarity, good color, why don't you cut it?"
"A piece of rough is a great thing to cut though."
"Tourmaline is actually a birthstone for October."
"Most gem buyers that know tourmaline, they're going to consider the color to be the dominant factor."
"Everyone should just learn to protect themselves and make sure that they get guarantees and if their Jade isn't natural or treated that they have some type of recourse absolutely."
"Ethiopian opal is known and notable for the fact that each stone is unique in terms of the palette of shades, pattern, and play of color."
"In gemology, what we're really doing is gathering information and ruling out options."
"To facet a stone, you have to control three things: the vertical angle, the rotational angle, and the height of the stone above the grinding disc."
"I think it's quite sticky, what goes on with the gem, it teaches you something and it kind of gets into your bones pretty quickly."
"It's interesting that rutile inclusions can form very unique and curious patterns."
"It's a rare sapphire with very distinguished growth lines."
"Lab-grown diamonds are not fake; they are actually real diamonds."
"Pockets are rare, and pockets containing preserved gem crystals are a miracle, really."
"Genuine diamonds are completely transparent to X-rays."
"It's a well-known gemstone and it was named by Tiffany and Co around when it was discovered in 1967 in Tanzania near the Kilimanjaro."
"It's a generational gemstone and once the mine is depleted then there will be no more."
"It combines my knowledge and my passion; my knowledge for gemology and my passion for watches."
"Diamonds do actually come in an array of colors that cover the spectrum."
"The most rare or the rarest color in diamond is no color at all."
"With a Mohs hardness of 9.25, it exceeds the hardness of most other natural gems."
"Gemologists will often call ruby the rock star of the gem world."
"It's still the closest we have ever come to creating natural opal."
"A brilliant cut looks like that, a crushed ice cut by comparison looks like you're looking at crushed ice."
"The whole stone... has to be an opal."
"The wider the range of the play of color, the higher the value."
"You want the most colors with the blackest base color."
"That is one killer egg! Oh my gosh, all the bands in there, wow!"
"I find this really amazing Rhodonite due to the vast variety of colors and patterns we see in the stone."
"Gemstones are the most rare and beautiful of all stones, but it's not easy to find them."
"The black prince's ruby is not really a ruby at all but a 170 carat spinel, the largest uncut spinel in the world."
"Damn, look at that stone; this, my friend, is a lab-grown diamond."
"I'm the diamond lady here, so call me whether it's lab-grown diamonds or natural diamonds."
"A cleavage plane is a plane of atomic weakness within the crystalline structure of a gemstone."
"Zircon is one of the oldest gemstones that have been found on the earth."
"Red and pink may not be very different on the color spectrum, but as far as gemology goes, they're quite different in price, especially, and in value."
"A report provides an independent assessment of the stone, thereby providing protection for the consumer."
"The Mogok Valley is the epicenter of where the finest rubies in the world have ever been discovered."
"The Jade trade is the most unique gemstone trade I've ever come across."
"Look at the size of this black diamond. So guys, if you're thinking about getting a female black diamond, this is what they get up to."
"That color, that is just like the richest rhodochrosite can be anywhere from like a light pink to that rich red which is obviously the most prized."
"Red beryl really is a special case."
"These are actual real quartz crystals."
"Since the days of the Babylonians, lapis has held a ritualistic value, celebrated for its deep blue color unmatched by any other stone or jewel."
"That's very typical of seam opal, as you can see it runs in a seam. We've got some nice greens; you move it about, you'll get your play of colors."
"An opal isn't just an opal across the board."
"It's a great price, I mean a lot of gem silica cabochons go for more than casual turquoise."
"If it feels dense or heavier than average, it could be a quality stone."
"This patent describes the change of colour and also the introduction of asterism into corundum by diffusing other external elements inside the stone during a very high heat treatment."
"This is a lot like a tourmaline crystal."
"By learning about your crystal systems, you can actually learn about the gemstones that you have in your jewelry or in your own collections at home."
"Take a closer look at this piece of emerald. I love the color and look at the shape; you can see six very distinct sides."
"What is diffusion treatment? These are gemstones that have a colour treatment."
"Savorite is a beautiful, beautiful green gemstone, very free of inclusions, but it's also very, very rare."
"With gemology, there's no kind of set career path; there's lots of options available to you, which means you can have a very diverse career."
"At GIA, we consider ourselves incredibly fortunate to study and learn from gems."
"Scientifically, there are things we can measure to understand what a gem is."
"Inclusions can actually be quite interesting and they can be very beautiful sometimes."
"Spectroscopy... to act as a storyteller for the diamonds."
"Some very special diamonds... can have additional defects created that impart a pink to red color in the diamond."
"We're so lucky to be able to study gems every day and it's our mission to share our learnings and discoveries with the world."
"Opal doublets from the face-up position give no indication at all that they're a gem that's been put together artificially."
"That's classic Kashmir with that sleepy look that is because of they have that very fine distributor particles throughout the stone that gives them that incredible Kashmiri appearance that everyone loves."
"Lab-grown and natural diamonds are made of the exact same structure."
"Ruby and Sapphire: a gemologist's guide by Richard Hughes is the book that has everything you ever could know about Ruby and Sapphire."
"We had to start looking at gemstones not just as optical devices but as geological specimens."
"For blue sapphires, you're taking those micro inclusions of titanium and dissolving it back into the corundum lattice."
"You have to be careful and just use some of these standard gemological tools in order to give you an idea of what you're looking for."
"Any laboratory-grown stone is kind of intended to look like the natural counterpart."
"Cassiterite on its own can be of gem quality, we can have some fantastic crystal specimens."
"We're so lucky and we're so excited to be able to study and learn from gems every day."
"Thank you so much for joining us and giving us all this fantastic information about laboratory-grown diamonds and the production in China."
"We're doing amazing, we're finding great Jade, every cut I make is awesome quality, awesome color."
"Star Ruby, the queen of stars, the color of love."
"At GIA, we consider ourselves pretty fortunate to study and learn from gems."
"The beauty of an opal is very much dependent on the placement of those patches of colors and the ranges of colors that you see in the opal."
"Fluorescence is the emission of light by a diamond when it absorbs UV radiation."
"We consider ourselves very fortunate. We get to study so many gems and diamonds."
"Geruda sapphire is a field on its own and really interesting to study."
"We can see that this is quite a dramatic change; we have severely altered the gemstone and we have greatly improved the colour, the clarity, and the transparency of the stone."
"Ultimately the aim of treatments is to make a gem look better or of higher quality and value than it would have done without the treatment."
"There are a lot of yellow gemstones, but this one is particularly special; this is a yellow sapphire."
"Gemstones and their inclusions act like little time capsules."
"And just like the insects tell the story of the amber, in a similar way, we use the inclusions in gemstones to tell the story of the gems that contain those inclusions."
"Whenever you see these inclusions intact, that tells you that the stone's not been heat treated."
"And so once you cut a gemstone, and you remove the host rock, you can still look at the inclusions and get a sense of the geologic environment based on the mineral suite in the assemblage inclusions that you might see inside that stone."
"So if you want to understand more about the gemstone host from a geological perspective, it's a natural thing to do to look at the inclusions, because the inclusions can give you extra clues about those geological formation conditions."
"You could take stones like that and turn them into stones on the right, these rich vivid blue colors by heat treating them, making these stones much more desirable for the world gem market."
"This is the basic fundamental principle of what's going on with the heat treatment of these sapphires."
"Yogos essentially never need to be heat treated in order to attain that bright, brilliant, rich blue color."
"The gift of gem identification was passed down to her through a family connection."
"Diamond... can separate light into its spectral colors, so when it's cut and polished, it really makes a beautiful gemstone."
"The brilliant cut is what most people associate with diamonds."
"How can you tell the difference between a gemstone and glass? Carnelian is a possibility."
"The mix cut also gives us pops and flashes of color and scintillation while preserving the weight of the overall stone."
"One of my favorite things about fluorite is that you could really collect it endlessly because it comes in every color available."
"I've got a yellow diamond and two white diamonds out of this 14 buckets."
"Only one in 10,000 diamonds found are colored."
"Only one out of 200 diamonds is flawless."
"The first two things you need to know about a gemstone: is it beautiful, is it rare?"
"You definitely have to be a gem detective when you're trying to figure out a gem's identity."
"Rubies are red, emeralds are green, what color are sapphires? Blue, very good."
"The green color in emerald is caused by traces of vanadium and chromium."
"John Saul mine in Kenya is still regarded as the finest color ruby in the world."
"Sapphires are blue, and any other colors such as yellow, pink, green, violet are all considered fancy sapphires."
"Sapphire is ranked nine on Mohs scale of mineral hardness."
"Pearls are the only gem in the world that is perfect at the moment that it's found."
"Chemistry-wise, lab-grown is exactly the same as a regular diamond. It sparkles the same way."
"Sapphire and ruby are part of the same family."
"Inclusions in sapphires... they're important because they can tell you that the stone is natural."
"Having been in the jewelry industry for quite a while now, I feel like whenever I see gemstones, it's so much more personal, so much more artistic, so much more life in it."
"I'm gonna discuss and show what I think are the major discerning assets and liabilities of each of these stones."
"I am an European authorized gemologist."
"Pearls are always with the gems they're assigned to."