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The value of sapphire
Sapphires are among the most beautiful, most sought-after and most expensive gemstones in the world. The blue gemstone is not only of interest to the jewelry industry for a long time. Given the value, sapphires have also emerged as an investment.
Table of Contents
Buying sapphire - the most important factors
The question of how expensive a gemstone is cannot be answered in general terms. The price of a gem is that Sum of the interplay of several factorsso that ruby, tanzanite, diamond, morganite and kunzite fall into completely different price categories.
The following criteria are primarily decisive for the price:
All criteria are used in pricing weighed against each other, with Color gemstones prioritize color as the most important feature becomes. However, the color of colored gemstones has not yet been standardized, so that different results can be obtained with regard to the classification of the color quality.
There is also the factor of availability. The rarity of a mineral can lead to astronomical prices.
The color of sapphire
Sapphires come in numerous color nuances; best known are blue sapphires. This is already indicated by the name, which comes from the Greek and is translated as blue.
Are less common and popular Sapphires of other colors. All non-blue sapphires - black, red-violet, pink, green, yellow and orange - are called Fancy sapphire Are defined. The fact that it is sapphire despite the unusual or unfamiliar color is often only clear from the name, e.g. pink sapphire or Padparadscha sapphire.
In the English-speaking world, the blue of sapphires is assessed according to the basic color (hue), saturation (saturation; pure or with a color cast) and the hue (tone; brightness, intensity of the basic color).
The most valuable coloring of sapphire is a brilliant cornflower blue and sapphires, the blue of which ranges between medium and dark blue lies without a hint of a different color being discernible. Among the fancy sapphires applies pink as the most exclusive color.
Numerous sapphires by nature do not correspond to the ideal: they are clearly gray or brownish, are too light or too dark blue, almost black. It is estimated that 90% of all sapphires traded in the gem market are color-altered. A fact that affects the price: natural, untreated sapphires are valued higher than stones refined by firing at 1800 ° C.
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The purity of sapphire
Small imperfections are the norm with sapphire. Natural sapphires with a very high level of transparency represent special treasures and the rating eye-clean (inclusions cannot be seen with the naked eye) is considered the optimum.
Burnt sapphires, on the other hand, are often much cleaner than untreated. In parallel to the burning, disruptive inclusions such as other minerals, gases or liquids that reduce the purity are eliminated as a result of the supply of heat.
Many sapphires are due to their origins often streaked with fine cracksthat make the stone look unclean. A method that has been standard for years is filling with lead glass - colorless or colored to intensify the blue tone. Lead glass has a refractive index comparable to that of sapphire, so that the subsequent filling is not noticeable and the whole stone appears more homogeneous and pure.
In some cases, inclusions can lead to desired effects, such as with cashmere sapphires, the inclusions of which give the blue gemstone a velvety appearance, or with star sapphires, where rutile needles embedded in the crystal create star-shaped light phenomena.
The cut of sapphire
When grinding sapphires, the aim is to achieve both To bring out color and brilliance in the best possible way.
The stone determines which cut is used. Cloudy, opaque specimens are smooth cut (e.g. cabochon cut), while crystal clear sapphires are facet cut (e.g. round cut, oval cut, navette / marquise, pear cut, baguette cut, emerald cut).
The cut is also noticeable in the price; Sapphire cabochons are technically less complex and time-consuming than facet cuts. The grinding of sapphires requires a lot of experience and precision, as the blue stones often have different intense color zones. A skilled cutter knows how to shape the gemstone in such a way that the stone shines in a color that is as strong and evenly distributed as possible.
Sapphire and carat
As with all gemstones, the price of a sapphire increases with the size of the carat.
High-quality sapphires are much rarer and therefore more expensive compared to "lightweights"Blue sapphires in the double-digit carat range are more common than fancy sapphires of comparable weight. A 5-carat paparajah sapphire is the exception.
Tab. 1: Summary of the price-forming factors
The price of sapphire
Every stone is unique and the price is just as individual - depending on the nature of the stone.
|blue (unfired)||1000 to 6000 euros|
|blue (burnt)||1 to 3000 euros|
|green (burnt)||75 to 100 euros|
|green (unfired)||1000 Euro|
|yellow (burnt)||100 to 150 euros|
|red-orange (burnt)||100 to 150 euros|
|Ceylon sapphire (br / unbr.)||600 to 50,000 euros|
Tab. 2, sapphire prices, details are not binding, but represent a cross-section of various sapphire suppliers.
⇒ Sapphires that aren't - fake sapphire
⇒ Blue diamonds
⇒ White sapphire
⇒ Bauer, J .; Tvrz, F. (1993): The Cosmos Mineral Guide. Minerals rocks precious stones. An identification book with 576 color photos. Gondrom Verlag GmbH Bindlach
⇒ Medenbach, O .; Sussieck-Fornefeld, C .; Steinbach, G. (1996): Steinbach's natural guide minerals. 223 species descriptions, 362 color photos, 250 drawings and 30 pages of identification tables. Mosaik Verlag Munich
⇒ Pellant, C. (1994): Stones and Minerals. Ravensburger nature guide. Ravensburger Buchverlag Otto Maier GmbH
⇒ Schumann, W. (1991): Minerals rocks - characteristics, occurrence and use. FSVO nature guide. BLV Verlagsgesellschaft mbH Munich
⇒ Schumann, W. (1992): Precious and precious stones: all precious and precious stones in the world; 1500 unique pieces. BLV determination book, BLV Verlagsgesellschaft mbH Munich
⇒ Schumann, W. (2017): Precious stones and gemstones. All kinds and varieties. 1900 unique pieces. BLV determination book, BLV Verlagsgesellschaft mbH Munich
⇒ Hochleitner, R. (2017): Which stone is that? Kosmos nature guide. Over 350 minerals, gemstones and rocks. Franckh Kosmos Publishing House
⇒ www.thenaturalsapphirecompany.com - Sapphire 4Cs | Determining Value in Sapphires | The 4Cs of Quality
⇒ www.gia.edu - Sapphire Quality Factors
- www.mindat.org - sapphire
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Last updated: March 27, 2020
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