Sapphire, with its hardness of 9 on Mohs hardness, is second only to diamond, which renders it one of the most valuable and wearable gemstones of all-time. Sapphire is a 'precious four' gem and offers superb brilliance and rich, vibrant colors. Although most sapphire is heated or enhanced in other ways to improve color, clarity and stability, unheated and completely untreated natural sapphire can still be found. Usually unheated sapphire gems are found only in small sizes, but occasionally, large, clean stones are uncovered too. Because unheated sapphire is such a rarity, they are indeed relatively expensive, particularly unheated top-color blue 'Ceylon' sapphire. Unheated, natural sapphire is mostly sourced from Africa, though Australia and parts of Asia are known to produce some fine materials too.
As of recent times, Madagascar and Tanzania are two of the most important sources for fine untreated, unheated sapphire, as is Thailand. Tanzanian sapphire is usually pink to violet in color (often violet-blue), and many of the specimens exhibit very noticeable color change properties. Color-change unheated sapphire can be very expensive and is highly sought-after by both jewelers and gem collectors. Fine quality unheated sapphire gems from Madagascar, as well as Australia, display silk inclusions, which are highly desirable. The silky appearance is cause by rutile inclusions and the presence of such silk is usually a good indicator that the gem has not been heated, since rutile inclusions melt at a much lower temperatures than those at which sapphire is heated. Sapphire is also the official birthstone for those born in the month of September.
Gesamtbewertung -> 10
I have purchased, many times & have always been pleased!
GemSelect has a wide selection of gems with photos of the actual gem that you will be purchasing, not some stock photo. Once a purchase is made, you can print out a certificate of authenticity. You know you are getting the real thing. The pricing is competitive. Their website also has useful information about gems.The website is easy to use. I have made multiple purchases with GemSelect, and I will be back again!
My experiences with Gemselect have always been quite satisfactory. The items are accurately photographed, a detailed description and provenance provided and the compare feature helps customers select the best gem for their needs. I have often recommended this source and will continue to do so.
I ordered several specific items from Gemselect. Items are always packaged very carefully to protect the content. Gemselect always encloses a card of authenticity which documents the entire stone, its size, clarity, etc. All of the items are as they were described. I would highly recommend them to anyone who’s in the market for a gem.
I frequently check the GemSelect website for a variety of gems. I've been very satisfied with the selection and quality of the top rated gems. All of the purchases I've made have turned out beautiful pieces of jewelry.