gemstones from kaisilver.

Custom Jewelry And Gemstones From Thailand

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Large Gems   

Custom Cut Gems Small And Large Gems 

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A large gemstone is obviously one that has large dimensions and a proportionately large carat weight. If you had to cut an agate stone to a large 18mm x 12mm oval shape and starved it to a 3 carat weight, it would be quite useless. The gem stone weight needs to support the large stone dimensions, if this does not happen the gem could be too thin an fragile. It is not uncommon for jewelers to trick innocent buyers by cutting opaque gems with insufficient weight. When it comes to a large gemstone that is transparent, proportionate weight is also responsible for giving enough 'body' to the stone. In this case facet reflections and color saturation will be influenced by the gem depth which in turn requires stone weight.

There is no standard that can be used to define which gem is large and which is not. Basically, the size of any gem that can be called large would depend on a few factors. The gem stone type, weight and quality would be the major deciding factors. For example if you wanted a large sapphire gem stone but did not care much about color, clarity and transparency you could get a large sapphire that weighs around 7 to 8 carats. The gem would be almost black and heavily included, a large sapphire gem of this type can be even as high as 10 carats. Such a gem would cost you no more than 400 U.S$ On the other hand if you need a good quality blue sapphire with ceylon blue sapphire color and fairly good color saturation, expect a size beyond 3 carats to be a large gem. Be prepared to pay out at least 2,500 U.S$ for such a large blue sapphire gem.  

We saw above how, the same gem type can refer to different sizes as being a large gem when quality differs. Let us now discuss how the definition of a large gem stone can differ depending on gem stone types. A good example is blue topaz, a stone that is available in sizes that can go as high as 40 to 50 carats. Though that size is not very common, you can get a 15 carat eye clean swiss blue topaz for around 200 U.S$. So a large blue topaz gem could be in the 10 carat and above range. Put this gem up against a ruby, another expensive gemstone that is rarely found in eye clean quality beyond the 1.5 to 2 carat size. A large gem with reference to a ruby would mean a 3 carat and above gem, this with medium grade quality. If you wanted a top quality Burmese ruby in the 3 carat range that was 'almost' eye clean and has a good color and color saturation, there is a very slim chance of finding one. And even if you did, expect to pay around 6,000 U.S$ to 8,000 U.S$ for such a gemstone.

Gemstone origin can sometimes restrict the size of a gem that can be called large. A good example is spessartite garnet, which was originally mined in Namibia. The gem stone was so rare that large gems meant Namibian spessartite gemstones in the 1.5 carat and above range! A few years later the arrival of spessartite from Nigeria overturned the entire gem stone industry. You can now get large spesssartite stones in the 3 to 4 carat range quite easily. However if you want a large Namibian spessartite, be prepared to restrict your selection to the 1.5 to 2 carat weight range. Pay a premium price and get a stone that looks quite ordinary!

The large gems shown on our website have been selected based on a number of factors and not merely, on dimensions or carat weight. We can procure and custom cut any gem that you need. If you need the stone to be within a specific budget, give us an idea of your budget too and we will work with you to decide on the best gem to suit your requirements and budget.

There is a very good reason why gem and jewelry buyers in over 17 nations rely on Kaisilver for their requirements. We are directly networked to leading gem miners and gem manufacturers in all continents. This gives us preferential access to well over 200 million carats of gems. We do not limit ourselves and buyers to a standard inventory. Every gem is procured directly from the source and custom cut according to the order requirement. The Directstones project is aimed at small gem buyers who are normally neglected by the big gem manufacturers. We welcome even single piece orders and do not put restrictions on minimum order in terms of value of quantity.  

sky blue topaz gemstone, light blue topaz gems can resemble the color of aquamarine.


A large gemstone, this is an 8.5 carat pale blue topaz. Also referred to as sky blue topaz, this shade of blue topaz can come close to the color of aquamarine. Please note that topaz and aquamarine are not the same gem. A large gem stone with a size of 14mm x 12mm would make a gorgeous pendant or a handsome mens topaz ring. An eye clean gem with good cutting and no color zoning. An amazing price of just 52.50 U.S$ for this handpicked and custom cut stone. Large topaz gems also available in swiss blue and london blue topaz. We can cut an entire matching set for you.

big garnet gemstone, marquise shaped large red garnet stone


It is not common to find large gemstones in oval shapes, this is what makes this large 15mm x 9mm marquise shaped red garnet very special. Choose this awesome 5 carat, large gem for an impressive pendant or a bold ring. The price of this big stone is just 85 U.S$ and this comes as a pleasant surprise. While we welcome even single piece gem stone orders, you can order as many pieces of this or any other gem that you need. Large garnets in all shapes and sizes are custom cut.

ceylon sapphire, blue oval sapphire gemstone from sri lanka


Gem type and quality define what is a large gem and what is not. This gorgeous large ceylon blue sapphire measures a tremendous 10mm x 8mm. Cut to proportion by some of Thailand's finest gem cutters, it boasts of a 3 carat weight. You can get a large gemstone that is cheaper but, the quality cannot match this beauty. So if you are not particular about a high quality sapphire, email us with your budget and we will custom cut another stone for you. This large ceylon sapphire stone sells for just 2,500 U.S$.


rubelite oval gemstone, rubelite tourmaline 10x8mm oval


Large rubelite gems are not common, this deep rubelite stone is suitable for a lady's or men's ring. A good size of 10mm x 8mm and a nice weight of 2.2 carats. The price of this gorgeous rubelite stone is just 125 U.S$. While rubelite gems can have a color that matches the more expensive ruby gemstone, rubelite and ruby are not the same. We can custom cut large rubelite gems in the shape and size that you need. Matching sets can also be provided to match your jewelry design requirement. You can buy just the large gem or request for a complete jewel to be custom made for you. Rubelite is the darker (reddish) variety of pink tourmaline.

big blue topaz gem, round london blue topaz gem stone


A large gem stone, this round london blue topaz measures a whooping 20mm. This is the color shade of blue topaz that puts the gem in the legue of the more expensive blue gems like blue sapphires, iolite and even tanzanite. A tremendous weight of 40 carats makes this large gem a collectors dream. The gem is eye clean and cut by Thailands best craftsmen. And if you are tempted to indulge yourself in this treasure, the attractive price will please you. The price of this gem is just 775 U.S$. Request for a matching set to make a stunning set of pendant, earrings and ring.

big garnet gem stone, loose gemstones garnets in all shapes and sizes


With most red garnets used in jewelry falling in the below three carat size range, this 5 carat deep red garnet gem surely classifies as a large gem stone. The impressive dimensions of this large garnet stone are 12mm. Like most large gemstones, this big red garnet is also suitable for a pendant in silver or gold. You can buy just this one piece, or request for as many pieces as you need. A very modest price tag of just 75 U.S$ for the piece means that, you get good value for your money. Matching sets for all gem types, shapes and sizes can be provided.


Who Is Kaisilver?

Having established itself as the world's leading online custom jewelry provider, Kaisilver now extends it's merchandise line to include gems. While there is no shortage of gem stones in the global market, reliable sources for the retail buyer requirements are not many. Most retail gem dealers work with limited inventories, this reduces buyer options. Another problem with these small dealers is the lack of information and reliability when it comes to gem authenticity and value for money. Kaisilver with it's wide network of gemstone mining and manufacturing resources, is the best source for gems of all types, shapes, sizes and cuts. With a support team that is compromised of jewelry and gemstone experts, the advice and suggestions made by the team relate to your requirements and not to fixed sales targets. The website shows a small sampling of the gems that we offer. You can infact request for just about any gem on the globe. All gems are sourced directly from the source, closely inspected and then custom cut by our expert cutters. With a buyer base that includes fashion models, government officials, casino and resort owners, lawyers, financial experts, students and professors, doctors and surgeons, sportsmen and newsreaders we have become the preferred choice for quality gems and jewelry. By cutting out middlemen commissions and multiple agents, we provide great value for your money. Our large online operation does not stop us from welcoming even the smallest order. Gold and silver jewelry is custom made with equal attention to quality, material and craftsmanship. You can choose from our designs or send us detailed for the style and design that you need.


How To Order?

The process to order gems and custom jewelry at Kaisilver is similar. We do not expect you to make a rush purchase. We do wish that you take the time to discuss your requirements with our experts. They will be in a position to provide constructive suggestions that will guide you to make well informed buying decisions. Email all your requirements to provide as much inputs as possible to help us make relevant suggestions. For example if you are keen on getting a green gemstone but, are not particular about it being an emerald mention this in your email. Our gem experts might suggest a green tourmaline or even a peridot instead of an emerald. This suggestion would reduce our profit margins but will give you a gem that, is much cheaper and even more durable as compared to an emerald. When it comes to payments we offer some very suitable options. Paypal is the preferred form of payment, it is fair to the buyer and seller. The buyer when using paypal never needs to reveal credit card of bank information to the seller. We also accept direct bank transfers but prefer to do this on a case by case basis. When it comes to online transactions these days, both buyer and seller are afraid of frauds. It is quite possible that you do not feel comfortable working with us at Kaisilver. We sometimes feel a little uncomfortable with certain transactions too and prefer to keep away from them. There have always been fears of processing payments through Western Union money transfers. With the latest fraud reports, fake sellers and even fake buyers have been pulling off many online frauds using this mode of payment. At the same time we do understand that armed forces from the U.S who are stationed in various global positions sometimes have no other mode of payment besides Western Union. We therefore accept this mode of payment but at the same time, request you to avoid this mode if you do not feel comfortable using it. Shipping is done through FEDEX and you can expect a production lead time of around 4 to 5 weeks from the date of order confirmation and receipt of payment. Every jewel is fully custom made and requires the complete attention and concentration of highly skilled craftsmen. When it comes to gems, we could provide faster lead times and this can be discussed for each specific order.

Buyer Testimonials.

Below are a few comments from some of our buyers. As mentioned above we have a very serious interest in buyer satisfaction since our very existence depends solely depends on satisfied buyers. A high degree of repeat orders and a large number of orders being received through buyer recommendations has been at the heart of our success. Kaisilver buyers include people from all professions and walks of life. Fashion models, sportsmen, politicians, lawyers, financial experts, doctors and surgeons, members of the armed forces, newsreaders and journalists, students, casino and resort owners make up most of our buyer list.

.......received ring yesterday as you promised. it is stunning, more beautiful than i expected. the design and craftsmanship are outstanding. thank you again, it has been a pleasure doing business with you. i will highly recommend you to everyone i know, and look forward to doing business with you in the future. your entire staff has been professional and you displayed a high degree of honesty and integrity throughout the transaction. thank your staff and your craftsman for their incredible work. please feel free to use me as a reference as a EXTREMELY satisfied customer. take care, i wish you all well. Lt. Colonel James William Brady USA, Ret. Beverly Hills, Florida
Thank you very much for all your information and help with the production and safe delivery of the ring. It is indeed more than I had hoped forand I'm sure will be a winner with my wife. It is a shame that other firms can not be as helpful, you are all to be congratulated - Thank you again. Mr.Peter Keeble, U.K.

The ring arrived and it is beautiful. Thank you for such a wonderful job. I will be looking at your website over the next couple of weeks to place an additional order. Your workmanship and pricing is excellent.
Thanks again,
Dr. David Williams, U.S



Large Gems


Most gems are sold by the carat. For example, a good sapphire can be priced at around 450 U.S$ for a 1 carat stone. However as gem size becomes larger there is no direct and simple calculation to derive the price. For example, a sapphire with the same quality but a higher carat size will cost much higher per carat. Looking at the above example, a large blue sapphire of around 4 carats and the same quality as the 1 carat stone (mentioned above) would sell for around 1,000 U.S$ per carat.

While a 3 carat good quality tanzanite would be called a large gem stone, a 2 carat swiss blue topaz cannot be called large. As blue topaz can be found in sizes of around 30 carats to 50 carats too. So the gemstone type would also define what a large gem would weigh.

The quality of the gem surely needs to be considered before you can call it a large gem stone. For example very low quality emeralds can be purchased in sizes of around 5 to 8 carats. These are dark and dull emeralds that have no clarity or lustre. If you compared them to a good grade emerald weighing just 3 carats, you surely cannot say that the 3 carat good quality emerald gem is not large.

The comparison of large gems and not large gems needs to be limited to natural gems. If you had to compare a 2 carat natural alexandrite with a 7 carat lab created (fake) alexandrite, it would be a comparison with no meaning at all.

The above classification will give you a rough idea, your jeweler should be able to provide more specific information depending on the type of gemstone, quality and even origin of the gem.

Email our support team at if you have any specific query or requirements. No purchase is necessary to get the benefit of our expertise.

Kaisilver has direct and preferential access to the world's leading gemstone mining operations. This allows us to get the best of the gems for our buyers. Some of Thailand's finest gem cutters cut each stone to buyer specifications. We can provide all types of gems in sizes and shapes of your choice. When it comes to gems like rubies, sapphires, emerald and tanzanite we offer grade options to ensure that you stay within your budget allocation.


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