Yuxi, Yunnan, China

Ruby crystals in marble matrix. Eric Quinter specimen.

© 2019 Harold Moritz

A rarely seen matrix ruby specimen from the Yuanjiang Ruby Mine in China. The piece came originally from the Rocksmiths, and was purchased by Chet in 2003. A handful of lustrous, sharp, well-formed, rich reddish-pink colored crystals of ruby measuring up to 1.0 cm across are associated with minor golden phlogopite and a bit of dark bronze colored ...

© Rob Lavinsky & MineralAuctions.com

Self collected in Aug 2022. Collected in placer from a tiny stream in Yuanjiang County, Yuxi City, Yunnan Province.

© Hercule Shen

This display case featured worldwide trilobite specimens from the collection of Tom and Pam Kottyan. This case was displayed at the 2015 Mansfield (Richland County), OH mineral and fossil show. The theme for the show was trilobites. This is a small cabinet specimen of the trilobite Eoredlichia sp.. Relative age dating places this specimen to ...

© Jamison K. Brizendine

LW-365 nm fluorescence. Collected in placer from a tiny stream in Yuanjiang County, Yuxi City, Yunnan Province.

© Hercule Shen

An irregular ruby crystal from Shaku Village, Yuanjiang County, showing a partially developed crystal face. The fluorescence spectrum for this specimen is included. Self-collected on June 9, 2024.

A rarely seen matrix ruby specimen from the Yuanjiang Ruby Mine in China. The piece came originally from the Rocksmiths, and was purchased by Chet in 2003. A handful of lustrous, sharp, well-formed, rich reddish-pink colored crystals of ruby measuring up to 1.0 cm across are associated with minor golden phlogopite and a bit of dark bronze colored ...

© Rob Lavinsky & MineralAuctions.com

A rarely seen matrix ruby specimen from the Yuanjiang Ruby Mine in China. The piece came originally from the Rocksmiths, and was purchased by Chet in 2003. A handful of lustrous, sharp, well-formed, rich reddish-pink colored crystals of ruby measuring up to 1.0 cm across are associated with minor golden phlogopite and a bit of dark bronze colored ...

© Rob Lavinsky & MineralAuctions.com

Usambara effect From Chen, L.-R.-X., Tian, Y.-M., Zhang, S.-T., Qu, Z., Shen, H.-T., Yang, X.-Q., & Zheng, Y.-K. (2025). Gemological and Spectral Characteristics of Andradite Garnets with Usambara Effect from Yuanjiang in Yunnan Province. Crystals, 15(12), 1042. https://doi.org/10.3390/cryst15121042

A pinkish-red spinel crystal cluster from Shaku Village, Yuanjiang County, showing partially developed crystal faces. Although ruby from this locality has been documented, spinel is actually more commonly found here than ruby. A 365 nm long-wave UV excited PL spectrum for this specimen is included. Taken with a Canon EOS 5D Mark II and a Laowa ...

A view of a placer deposit near Shaku Village, Yuanjiang County. At the base of the slope, two local villagers are seen collecting ruby and spinel. Photo taken on June 8th, 2024.

A view of the terrace landscape from Shaku Village, Yuanjiang County. Photo taken on June 8th, 2024.

An upper view of the placer deposit near Shaku Village, Yuanjiang County. Photo taken on June 8th, 2024.

Collecting ruby and spinel in a small stream near Shaku Village, Yuanjiang County. A small spinel crystal was discovered at the bottom of the streambed. Toward the end of the video, several of the collected spinel and ruby crystals are temporarily placed on a flat rock, where specimen RLA-P6Y can also be seen. The video was recorded on June ...

An irregular ruby crystal from Yunnan, China, displaying partially developed crystal faces. The fluorescence spectrum for this specimen is included. Self-collected on June 9, 2024.