Turquoise / Nishapur / Ring / Cabochon / new- 5.5 g - (1)
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Selected by Antonio Rapisarda
Holds a master’s in chemistry with 25 years’ experience in minerals consulting.
Estimate € 150 - € 200
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Nishapur turquoise cabochon ring set in 925 sterling silver, weighing 5.5 g, size U54 (US 6.8, UK N, FR 14), originating from Persia.
AI-assisted summary
Description from the seller
Ring Nishapur turquoise / cabochon / new
Set in 925 sterling silver
Weight: 5.50 g
18.6 mm x 14.3 mm
New and unworn
Ring size:
U 54
UK N
US 6.8
FR 14
Inner diameter: 17.2 mm
The mineral turquoise is a relatively rare hydrated copper-aluminum phosphate from the mineral class of "Phosphates, Arsenates and Vanadates" with the chemical composition CuAl6(PO4)4(OH)8·4H2O. In place of aluminum, iron can be incorporated into the crystal structure as Fe3+ (diadochy), which is why the chemical formula is also often given as Cu(Al,Fe)6(PO4)4(OH)8·4H2O.
Turquoise crystallizes in the trisystem and provides the name for a group of minerals with the same structure but different composition, the turquoise group, with further members hypov: Faustite, Chalkosiderite, Ayelite, and Planerite.
In nature, turquoise usually forms botryoidal or earthy-massive mineral aggregates. Crystals visible to the naked eye are very rare and then only a few millimeters in size with a prismatic to needle-like habit. The color turquoise owes its name to its characteristic blue-green color.
Turquoise is exclusively processed into gemstones for jewelry stones.
Shipping as insured registered mail.
Seller's Story
Dipl. Geol. Tim Güldenpfennig
Translated by Google TranslateRing Nishapur turquoise / cabochon / new
Set in 925 sterling silver
Weight: 5.50 g
18.6 mm x 14.3 mm
New and unworn
Ring size:
U 54
UK N
US 6.8
FR 14
Inner diameter: 17.2 mm
The mineral turquoise is a relatively rare hydrated copper-aluminum phosphate from the mineral class of "Phosphates, Arsenates and Vanadates" with the chemical composition CuAl6(PO4)4(OH)8·4H2O. In place of aluminum, iron can be incorporated into the crystal structure as Fe3+ (diadochy), which is why the chemical formula is also often given as Cu(Al,Fe)6(PO4)4(OH)8·4H2O.
Turquoise crystallizes in the trisystem and provides the name for a group of minerals with the same structure but different composition, the turquoise group, with further members hypov: Faustite, Chalkosiderite, Ayelite, and Planerite.
In nature, turquoise usually forms botryoidal or earthy-massive mineral aggregates. Crystals visible to the naked eye are very rare and then only a few millimeters in size with a prismatic to needle-like habit. The color turquoise owes its name to its characteristic blue-green color.
Turquoise is exclusively processed into gemstones for jewelry stones.
Shipping as insured registered mail.
Seller's Story
Dipl. Geol. Tim Güldenpfennig
Translated by Google TranslateDetails
Number of objects
1
Main mineral
Turquoise / Nishapur
Mineral form
/ Ring / Cabochon / new
Supplement
925. Sterling silver
Weight
5.5 g
Country of origin
Persia
Sold by
GermanyVerified
protop
Rechtliche Informationen des Verkäufers
- Unternehmen:
- Tim Güldenpfennig
- Repräsentant:
- Tim Güldenpfennig
- Adresse:
- Tim Güldenpfennig
Hegelstr. 32
72108 Rottenburg
GERMANY - Telefonnummer:
- +4915756630304
- Email:
- tigue@gmx.de
- USt-IdNr.:
- DE246631347
AGB
AGB des Verkäufers. Mit einem Gebot auf dieses Los akzeptieren Sie ebenfalls die AGB des Verkäufers.
Widerrufsbelehrung
- Frist: 14 Tage sowie gemäß den hier angegebenen Bedingungen
- Rücksendkosten: Käufer trägt die unmittelbaren Kosten der Rücksendung der Ware
- Vollständige Widerrufsbelehrung
Disclaimer
It is believed that certain gemstones and minerals have beneficial health and spiritual properties. However, using or wearing gemstones or minerals does not mean that you can treat, cure or prevent any disease. Please consult your health care professional for information on health care issues and do not stop any medications or courses of treatment, without first consulting your health care professional. The use of gemstones or minerals as a wellness therapy is one of personal choice. While stones or crystals have been used historically to relieve or prevent symptoms, the objects sold on our website offer no guarantee of results. Therefore, Catawiki cannot guarantee or be held liable for the effectiveness of these objects sold herein.
It is believed that certain gemstones and minerals have beneficial health and spiritual properties. However, using or wearing gemstones or minerals does not mean that you can treat, cure or prevent any disease. Please consult your health care professional for information on health care issues and do not stop any medications or courses of treatment, without first consulting your health care professional. The use of gemstones or minerals as a wellness therapy is one of personal choice. While stones or crystals have been used historically to relieve or prevent symptoms, the objects sold on our website offer no guarantee of results. Therefore, Catawiki cannot guarantee or be held liable for the effectiveness of these objects sold herein.
