Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings
Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck koch hofjuwelier atelier juwelen schmuck Fa.Friedrich Kreuter & Co. Hanau Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck  koch hofjuwelier atelier juwelen schmuck Fa.Friedrich Kreuter & Co. Hanau Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck koch hofjuwelier atelier juwelen schmuck Fa.Friedrich Kreuter & Co. Hanau Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck koch hofjuwelier atelier juwelen schmuck Fa.Friedrich Kreuter & Co. Hanau Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck Eulalia's bandeau was designed as a peacock with large cabochon turquoise set in it's wings Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck
Turquoise Jewels with Diamonds| Jewelry |Fürstin Therese von Thurn-Taxis | Schmuck

Turquoise Jewels with Diamonds| Jewellery |Fürstin Therese von Thurn-Taxis | Schmuck

Turquoise Jewels with Diamonds| Jewellery |Fürstin Therese von Thurn-Taxis | Schmuck

Turquoise and Diamond Parure

The parure from the 1840s, mounted in silver and gold, "comprises a necklace with detachable bow centre-piece, a pair of flaring bracelets, a larger, two medium-sized and two small bow-knot brooches, all set with oval turquoises flanked by courses of rose diamonds, the necklace also with diamond floral motifs. This parure was offered at the famous auction at Sotheby's Geneva 17 Nov 1992.

 


The Turquoise and Diamond Brooch/Bracelet Clasp or Necklace Front Clasp

In the portrait above, Fürstin Therese von Thurn und Taxis, painted in 1833 by Stieler, is wearing a large three strand pearl necklace with an clasp of turquoise and diamonds.
"Designed as a larger central oval cluster set with a turquoise within a two-row border of smaller turquoises and cushion-shaped diamonds, flanked by two detachable similarly set smaller clusters (one turquoise has been replaced with glass)."
The tripartite clasp probably had an alternative function as a bracelet clasp with a band formed of strings of pearls. Several designs for variants of the three-part construction are known from Köchert.

This complex clasp was made for a triple-row pearl necklace worn by Fürstin Therese von Thurn und Taxis  who was born the Duchess of Mecklenburg-Strelitz (1773-1839). She was aged sixty when Stieler painted her portrait. Like her sister Queen Luise of Prussia, she was well-read, artistic and enthusiastically involved in the politics of the day. As wife of Fürst Carl Alexander, she staunchly defended the interests of the House of Thurn and Taxis at the Vienna Congress of 1815.

The set was later testet from SSEF and the following details are:

A set of six antique brooches, set with diamonds
and light blue cabochons, was investigated with microscopy, Raman analysis, and EDXRF spectroscopy. Most of the cabochons proved to be
fossilized dentine, also known as odontolite (mineralogically, fluorapatite). The brooches also contained turquoise and artificial glass.

It has been widely used in jewelry in the Middle East (Egypt and Persia), the Far East (Tibet, Mongolia, and China), and by native North Americans (Ahmed, 1999; Chalker et al., 2004). Yet turquoise was once very fashionable in Europe, especially during the 18th and 19th centuries , so it is not surprising that imitations were used when genuine turquoise was not available. The wide range of turquoise imitations includes secondary minerals from copper deposits such as chrysocolla, dyed minerals such as magnesite or howlite, and artificial materials such as glass or sintered products (Arnould and Poirot, 1975; Lind et al., 1983; Fryer, 1983; Kane, 1985; Hurwit, 1988; Salanne, 2009). In this study, we report on a historic turquoise substitute—fossilized dentine, also known as odontolite, ivory turquoise, bone turquoise, or French turquoise. Much of this material consists of fossilized mastodon ivory from Miocene-age (13–16 million years old) sedimentary rocks of the Gers District between the Aquitaine and Languedoc regions of southwestern France (Reiche et al., 2001). The tusks are hosted by alluvial sediments (molasse alternating with fine sand and clay facies) that accumulated in basins during the erosion of the nearby Pyrenees Mountains (Crouzel, 1957; Antoine et al., 1997). The fossilized dentine consists mainly of fluorapatite, Ca5(PO4) 3F; since medieval times, local Cistercian monks have used a heating process to turn the material light blue (de La Brosse, 1626; Réaumur, 1715; Fischer, 1819), which they thought to be turquoise. These “stones” were originally set in medieval religious artifacts, but came into fashion in the early to mid-19th century (Brown, 2007),

Odontolite is fossilized dentine (mastodon ivory) from France that has been heat treated to produce its blue coloration. • This historic turquoise substitute was identified in a set of six antique brooches set with diamonds. • A combination of microscopic observation and Raman spectroscopy was effective for separating odontolite from the turquoise and artificial silica glass also present in the brooches.


T he Swiss Gemmological Institute SSEF recently received a set of six antique brooches for
identification (figure 1). These same pieces had already been presented in Bennett and Mascetti (2003, p. 102) as turquoise jewelry. They were set with numerous small rose-cut diamonds and a few larger old-cut diamonds, but most prominent were a number of light blue to greenish blue cabochons that appeared to be turquoise. Visual examination quickly revealed otherwise. C

More about the experts fromSwiss emmological Institute

Source:SSEF; Sotheby's


Türkis Collier mit Diamanten, Halsband mit Türkisen der Parure mit Türkis Pfauen Diadem | Fürst Thurn-Taxis Schmuck Juwelen

Royal Peacock Turquoise Tiara with Diamonds| Fürst Thurn-Taxis Jewels | Jewelry

Pfauen-Diadem |Türkis-Diamant Diadem| Princessin Eulalia von Thurn-Taxis |Schmuck & Juwelen

Prinzessin Eulalia von Thurn und Taxis Hochzeit | Schmuck und Juwelen | Jewels | Wedding

Parure Empire Style Diamant Diadem | Historic Diamond Tiara of the Princes of Thurn and Taxis

Empire Style Diamant Saphir Diadem | Sapphire Diamond Tiara of the Princes of Thurn and Taxis

Turquoise Jewels with Diamonds| Jewelry | Fürstin Therese von Thurn-Taxis | Schmuck

Sapphire Diamond Bow Brooch Stomacher | Thurn and Taxis Royal Jewels

Smaragd Diamant Brosche | Schmuck Thurn und Taxis| Jewels stomacher devante de corsage emerald brooch made by Hancocks

Emerald Diamond Tiara of the Princes of Thurn and Taxis Diadem | Emerald Drop | Hancock Diadem

Fürstin Margarethe:Diamant Diadem mit Smaragdtropfen |Hancocks Emerald and Diamond Tiara

Fürstin Gloria:Diamant Diadem mit Smaragdtropfen | Hancocks Emerald and Diamond Tiara

Bericht über die grosse fürstliche Juwelen-Auktion | The auction of the princely Jewels Thurn and Taxis

Thurn und Taxis Jewels | Schmuck Ein Teil der versteigerten Ring-Collection | Jewelry The Ring Collection

Saphir-Diamant-Schmuck | Thurn und Taxis Jewel History| Royal Sapphire - Diamond Jewels Bracelet

Smaragd-Ohrringe der Grossfürstin Wladimir | Imperial Jewels | Romanov Emerald Earrings of the Grand Duchess Wladimir

Diamant-Collier und Starbust Halsband der Versteigerung | Jewels Jewelry Princes Thurn and Taxis Diamond-Collier Starbust Necklace

Emerald and Ruby Dogcollar | Diamond Choker | Collier de Chien with Diamonds,Emeralds,Rubies |Princess Margarete of Thurn und Taxis

Das historische Smaragd-Rubin-Diamant Halsband des Fürsten von Thurn und Taxis | Royal Jewels| Emerald Ruby Choker with Diamonds of the House Thurn and Taxis

Die historische Smaragd Diamant Brosche des Fürsten von Thurn und Taxis | Royal Jewels| Emerald Brooche, Stomacher, Devante de Corsage with Diamonds of the House Thurn and Taxis

Smaragd Corsage Brosche mit Diamanten | Emerald Devant de Corsage | Royal Jewel Jewelry of the Princess of Thurn and Taxis

Kleine Diadem mit Diamanten und Brillanten der Fürstin Therese |Royal Imperial Jewels| Small diamond tiara of Fürstin Therese Thurn and Taxis

Smaragd Corsage Brosche mit Diamanten | Emerald Devant de Corsage | Royal Jewel Jewelry of the Princess of Thurn and Taxis

Kleine Diadem mit Diamanten und Brillanten der Fürstin Therese |Royal Imperial Jewels| Small diamond tiara of Fürstin Therese Thurn and Taxis

Diamant Diadem in Schleifenform | Schmuck| Thurn und Taxis Jewels |Princess Maria Josephas Diamond Bow, Garland Tiara

Das Rubin Cabochon Diamant Halsband im Stil der 40er Jahre von Fürstin Gloria | Rubies Ruby Necklace with Diamonds | Imperial Royal Jewelry | Princess of Thurn and Taxis

Brosche Devante de Corsage der Kaiserin Marie Louise von Frankreich | Imperial Jewels Thurn Taxis Jewelry | Empress Marie Louises diamond stomacher

Das Köchert Fuchsien Diadem | Thurn & Taxis Jewels | The Diamond Fuchsia Tiara made by Koechert

Das grosse Diamant Empire Diadem der Fürstin Margarethe | Large Diamond Empire Tiara

Die Rubin - Ohrringe aus dem Haus Orleans | Ruby Earrings Earpendants with Diamonds Princess Thurn and Taxis Rubies

Bericht über die grosse fürstliche Juwelen-Auktion | The auction of the princely Jewels

Das Perlen Diamant Diadem der Kaiserin Eugenie von Frankreich | Royal Imperial Pearl and Diamond Tiara of Empress Eugenie | Jewel History

Fürstenhochzeit mit dem Diadem | Princess Thurn and Taxis Wedding | Historic Jewels Pearls

Perlen Diamant Devant de Corsage |Historic Pearl Jewels| Imperial Royal Jewelry | Thurn&Taxis Diamond Pearl Devant de Corsage

Laurel Leaf Tiara with Diamonds| Princess Antonia of Thurn-Taxis Jewels | Royal Jewelry

Lorbeerkranz-Bandeau | Lorbeer Blatt Diamant Diadem | Prinzessin Antonia von Thurn-Taxis |Schmuck & Juwelen

Royal Sapphire and diamond tiara Palmette Diadem Princess Thurn & Taxis |Infanta Maria Teresa von Braganza| Princess Karl Ludwig Thurn und Taxis |Wedding

Saphir und Diamant Palmetten Tiara der Prinzessin von Thurn & Taxis |Infanta Maria Teresa von Braganza| Prinzen Hochzeit Braut Geschenk

Königliche Hochzeit, Infantin Maria Theresa von Portugal Sapphire und Diamant Palmetten Tiara der Prinzessin von Thurn & Taxis | Maria Teresa von Braganza| Prinzen Hochzeit Braut Geschenk

Opal Diamond Brooches Opal Stomacher Opal Devante de Corsage|Princess Helene of Thurn und Taxis Herzogin in Bayern| Royal Wedding Gift

 

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