gemstones from kaisilver.

Custom Jewelry And Gemstones From Thailand

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Big Gem Stones   

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A big gem is obviously a gem stone with a large size and therefore a large carat weight. But when you refer to large gems it relates to gems that have been cut and polished, not to gems in their rough form. A large amethyst rock that is mined could weight 10 kilos or more, in the gemology trade this is not a big amethyst. When gem cutters start cutting this big piece of rough, they will need to take off the portions that are cracked, too included and even colorless zones. This will normally result in many small rough gem pieces that need to be further cut and polished. The 10 kilo amethyst rough would yield about 2 kilos of good rough in smaller pieces. Each of those small rough pieces needs to be further cut with preshapes and facets. At this point of time, a huge cutting loss will result and this could be as high as 80% to 90% of the rough gemstone piece. The interesting thing is that the largest gem stone that could be cut from this 10 kilo giant rough gemstone, might be no more than a 10 carat piece which is basically 2 grams! So the weight of good gem quality stones that come out of the 10 kilo rough, would most likely be less than 500 grams or half a kilo! The discussion on this page is relevant only to natural gems, we do not talk about cheap factory made imitations.

So what is a gemstone size that would entitle it to be classified as a big or large gem stone? You could define a big gem based on it's cut dimensions (generally in mm) or by it's weight (carat which is 1/5 of a gram). Most gems are sold by weight, so you would get a price per carat. Same quality gems would generally have a higher price per carat as the gem size increases. We just saw in the above paragraph that getting a big gem (finished and cut) is rare even if, the original rough rock weighed 10 kilos or more. You will also need to consider the type of gem when defining what would be big, medium or small size.

All gems are not priced the same per carat. In general, gems with a higher price per carat would have a smaller carat size even in the big gem category. For example, a good quality blue topaz might sell for around 7 U.S$ to 10 U.S$ per carat. A blue topaz size of around 10 carats or more would put it in the big gem stone category. If you had to compare this with a good quality blue sapphire, the price per carat could be as high as 1,000 U.S$ per carat. A large blue sapphire gem can therefore be expected to have a weight of around 3 carats or more.

The jewelry design that you use will need to consider the type of gemstone being set in it. A 25 carat blue topaz pendant cannot be attempted with a natural sapphire gem. Most gem experts would have never seen a good quality 25 carat blue, pink, green or orange sapphire. When you hear of things like large pendant with 20 carats of natural good quality pink sapphires, expect to find many small gems in the design NOT one large pink sapphire weighing 20 carats. The stone that best explains the relation between price and size is a diamond. A good quality 2 carat diamond can be in the 10,000 U.S$ to 25,000 U.S$ range. This is the reason why most jewels use smaller diamonds in the 1.5 to 2.5mm size range.

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.  

large pink sapphire gem oval, big sapphire


Sapphires in the 2.5 carat and above size can be called big gems, this is an amazing large pink sapphire gem stone. Good color and clarity combned with a weight of 3.5 carats leave no doubt about it being a big and gorgeous sapphire gem stone. By sapphire standards and considering the good quality, the size of 10mm x 7.5mm is almost enormous. If you are looking for a pink sapphire wedding or engagement ring, the budget price of 3,500 U.S$ for this big sapphire maket is a great buy. Remember that we can provide all gems in all shapes and sizes.


emerald gemstone, big emerald heart shape


This big emerald has two great features. It is large 9mm in size and is heart shaped. Heart shaped emeralds are hard to find and big emeralds gems with heart shape are even rarer. The big emerald gem stone shown here has a weight of 3 carats, giving it a weight that is proportional to the size. All emeralds have visible inclusions and fissures, this gem does not have much transparency. This comes as a blessing since the price is just 1,450 U.S$ for this large emerald stone. We can custom cut all emeralds to the shape and size that you need.

tourmaline gem stone, green tourmaline gems


A spectacular 13mm long green tourmaline. Handcut to perfection by Thailand's best gem cutters. Cushion cut big emerald gem sizing up to an impressive 13mm x 8.3mm. It is not often that you come across a green tourmaline of this size with good clarity and color. Backed by a weight of 4.5 carats, this big green stone would be adored by all gem lovers. Suitable for a big gem stone ring or pendant, we can ofcourse custom cut an entire matching set of stones for you Priced at just 375 U.S$, this big stone is a great buy. Tourmalines in all shapes and sizes available.

trillion shape yellow citrine gemstone, citrine gems


Not every 4 carat size citrine would classify as a big gem stone but, this pulsating gemstone is an exception. The trillion 9mm citrine stone shown here has a multi faceted cushion cut on the top. This cut shows good glitter and is popularly known as the checkerboard cut. Get this big citrine gem for your pendant or extravagant ring, or preserve it in your gemstone collection. A very affordable 30 U.S$ price tag, gives you one more reason to buy it. You can order just the gem stone or request Kaisilver to make a complete jewel for you.


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



Big Gem Indicators


This is a rough grouping of big gems by gem type. Please note that we are referring only to natural gems and not factory made fakes.

These gems can be considered to be fairly large in the weight range of 0.5 carats to 1 carats. Diamonds, alexandrite and demantoid garnet.

Large if in the 2 to 3 carat size range. Alexandrite, diamonds, demantoid garnet, nigerian spessartite garnet, black opal,  pink sapphire, chrysoberyl (cats eye).

Large in the 3 to 5 carat size range. Good quality ruby, blue sapphire, pink sapphire, green sapphire, emerald, tanzanite, peridot, kunzite, aquamarine, iolite, pink tourmaline, all colored spinels except black, green tourmaline, rubelite, good quality jadeite.

Large in the 5 to 8 carat range. Mozambique red garnet, good quality amethyst, aquamarine, iolite, fire opal, white opal, all sapphires, rubies, emeralds, tanzanite, kunzite, rhodolite garnet, african amethyst, danburite.

Large in the 9 to 12 carat range. Good amethyst, good citrine, madeira citrine, all red garnets, all colors of tourmalines, bloodstone, jadeite, good quality turquoise.

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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