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In 1986, California named benitoite as its state gemstone, a form of the mineral barium titanium silicate that is unique to the Golden State and only found in gem quality in San Benito County. [80] ^ Colorado is the only state whose geological symbols reflect the national flag's colors: red (rhodochrosite), white (yule marble), and blue ...
In 1989, a Swedish team under the direction of P.M. Fischer started excavations at the settlement of Tell Abu al-Kharaz in Jordan Valley, where Chocolate-on-White Wares had been found. Ten seasons of excavations (state 1999) produced 347 stratified vessels, which were included within the Chocolate-on-White Ware group as satisfying a number of ...
The region has the highest level of rainfall in Jordan, with around 500 millimeters (20 in) annually. Jabal Ajlun's relief is characterized by deep ravines that protrude from the Jordan Valley. The numerous springs and streams of the region supply its thick forests and historically enabled the widespread terrace-based cultivation of olive and ...
Lapis lazuli is found in limestone in the Kokcha River valley of Badakhshan province in north-eastern Afghanistan, where the Sar-i Sang mine deposits have been worked for more than 6,000 years. [20] Afghanistan was the source of lapis for the ancient Persian, Egyptian and Mesopotamian civilizations, as well as the later Greeks and Romans.
East of the Jordan River Valley, the land surface eroded to a nearly flat peneplain and many Proterozoic sediments were eroded. Before Cambrian sediments began to accumulate quartz porphyry lavas erupted to the surface. Tectonic conditions favored the preservation of Proterozoic sediments in the Wadi al'Arabah as Cambrian sandstones began to form.
Bahia Emerald [2]; Carolina Emperor, [3] [4] 310 carats uncut, 64.8 carats cut; discovered in the United States in 2009, resides in the North Carolina Museum of Natural Sciences, Raleigh, NC, US
An ancient underground quarry in the Jordan Valley was discovered in 2009 by University of Haifa archeologists. [3] [4] The quarry is located about 3 miles (5 km) north of Jericho, West Bank. [3] [4] [5]
The Kimberley diamonds were originally found in weathered kimberlite, which was colored yellow by limonite, and so was called "yellow ground". Deeper workings encountered less altered rock, serpentinized kimberlite, which miners call "blue ground". Yellow ground kimberlite is easy to break apart and was the first source of diamonds to be mined.