Rhodochrosite is a manganese carbonate mineral with chemical composition MnCO3. In its (rare) pure form, it is typically a rose-red color, but impure specimens can be shades of pink to pale brown. It streaks white, and its Mohs hardness varies between 3.5 and 4. Its specific gravity is between 3.5 and 3.7. It crystallizes in the trigonal system, and cleaves with rhombohedral carbonate cleavage in three directions.

Emergency personnel respond to the scene of a train derailment in Santiago de Compostela, Spain, on Wednesday, July 24, 2013. A train derailed in northwestern Spain on Wednesday night, toppling passenger cars on their sides and leaving at least one torn open as smoke rose into the air. Dozens were feared dead, with possibly even more injured. (Photo by Antonio Hernandez/AP Photo/El correo Gallego)

Float builder Andrea works on a float which depicts Russia's President Vladimir Putin as warmonger, at the float hall of the Mainz Carnival Association (MCV), in Mainz, Germany, 02 February 2016. The MCV invited journalists to a preview of this year's floats for the upcoming Shrove Monday carnival parade. The main carnival season festivities will happen around Rose Monday on 08 February. (Photo by Fredrik von Erichsen/EPA)

Samy Rose Moshiri, an Iranian American artist and activist, covers the mouth of Belarusian activist Yadviga Krasovskaya after dousing themselves in fake blood on stage at a Freedom Rally for Iran, in support of Iranian women and against the death of Mahsa (Zhina) Amini, outside City Hall in Los Angeles, California, U.S., October 1, 2022. (Photo by Bing Guan/Reuters)

An Indonesian devotee cleans and purifies a holy statue of the Gods with tea, roses and cendana water at Suka Loka Tri Dharma Temple on January 26, 2022 in Surabaya, Indonesia. Countries around Southeast Asia are set to welcome a lively Chinese New Year, despite implementing strict health protocols as Chinese populations curtail celebrations due to the COVID-19 pandemic. The first day of the Lunar New Year, on February 1, will usher in the Year of the Tiger. (Photo by Robertus Pudyanto/Getty Images)

Honey bees and ground bumblebees fly with thick purple pollen pouches to the flower of a corn poppy, also called poppy or corn rose, to obtain nectar in Berlin, Germany, Tuesday, June 7, 2022. Bumblebees, which like bees belong to the stinging bee family, form so-called summer colonies that exist for only a few months. (Photo by Wolfgang Kumm/dpa via AP Photo)

“The popularity of the Internet in China has driven the explosive growth of profitable Web companies and made fortunes for some Chinese entrepreneurs despite government controls on what the public can see online. The number of mainland Internet users rose to 513 million in December, up 12 percent from a year earlier, the government-sanctioned China Internet Network Information Center said”. – AP Business Writer

Photo: Shi Yongxin, abbot of the Shaolin Temple, works on the computer April 8, 2005 in Dengfeng, Henan Province, China. (Photo by Cancan Chu/Getty Images)

An employee works on the automobile assembly line of a Citroen C3 car at the PSA Peugeot Citroen plant in Poissy, near Paris, France, April 29, 2015. PSA Peugeot Citroen said on Wednesday its revenue rose in the first quarter as the recovering French carmaker's efforts to raise prices helped offset weaker volumes. (Photo by Benoit Tessier/Reuters)