Synthetic Emeralds Grown by W. Zerfass: Historical Account, Growth Technology and Properties

Schmetzer, Karl; Gilg, H. Albert; Vaupel, Elisabeth

doi:10.15506/jog.2017.35.5.404

Cited by 1 publication

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Trace element and REE patterns of the synthetic Gilson emerald from this study are like Colombian emeralds, which might indicate that natural Colombian emerald seeds were used in the process of forming the sample (MGMH#109678). Two distinct features are the high concentrations of Mo and lack of water, as Gilson synthetic crystals are grown from a lithium molybdate flux [31] and the flux is anhydrous [32] Elements are ordered by relative incompatibility and normalized to continental crust composition [28].…”

Section: Compositions Of Other Beryl Varieties and Inclusion-rich Emeraldsmentioning

confidence: 99%

Rare Earth Element and Incompatible Trace Element Abundances in Emeralds Reveal Their Formation Environments

Alonso-Perez

Day

2021

Minerals

View full text Add to dashboard Cite

Emeralds require the unusual association of typically compatible elements (Cr, V), with incompatible Be to form, and occur in complex tectonic settings associated with sediments (type IIB; Colombia) or, more commonly, with magmatism and regional metamorphism (IA). Precise rare earth element (REE) and incompatible trace element abundances are reported for a global suite of emeralds, enabling the identification of the environments in which they formed. Type IIB emeralds have nearly flat continental crust normalized REE patterns (La/YbCC = ~2), consistent with a sedimentary source origin. Type IA emerald REE patterns have upturns in the heavy REE (La/YbCC = ~0.3), a feature also shared with South African emeralds occurring in Archaean host rocks. Modeling of type IA emerald compositions indicates that they form from magmatic fluids of sedimentary (S)-type granite melts interacting with Cr, V-rich mafic–ultramafic crustal protoliths. This geochemical signature links emerald formation with continental suture zones. Diamonds, rubies, and sapphires have been considered as ‘plate tectonic gemstones’ based on mineral inclusions within them, or associations with plate tectonic indicators. Emeralds are distinct plate tectonic gemstones, recording geochemical evidence for origin within their mineral structure, and indicating that plate tectonic processes have led to emerald deposit formation since at least the Archaean.

show abstract

Section: Compositions Of Other Beryl Varieties and Inclusion-rich Emeraldsmentioning

confidence: 99%

Rare Earth Element and Incompatible Trace Element Abundances in Emeralds Reveal Their Formation Environments

Alonso-Perez

Day

2021

Minerals

View full text Add to dashboard Cite

show abstract

Synthetic Emeralds Grown by W. Zerfass: Historical Account, Growth Technology and Properties

Cited by 1 publication

References 18 publications

Rare Earth Element and Incompatible Trace Element Abundances in Emeralds Reveal Their Formation Environments

Rare Earth Element and Incompatible Trace Element Abundances in Emeralds Reveal Their Formation Environments

Contact Info

Product

Resources

About