People stand and take selfies in front of lava from the eruption of Mount Nyiragongo, in Buhene, on the outskirts of Goma, Congo in the early hours of Sunday, May 23, 2021. Congo's Mount Nyiragongo erupted for the first time in nearly two decades Saturday, turning the night sky a fiery red and sending lava onto a major highway as panicked residents tried to flee Goma, a city of nearly 2 million. (Photo by Justin Kabumba/AP Photo)

A sommelier serves the glass with 2021 Beaujolais Nouveau wine of a young woman bathing in a red colored hot water bath, on the day of the Beaujolais Nouveau official release, at Hakone Kowakien Yunessun hot spring resort in Hakone, Japan, 18 November 2021. Japan is a major market for the Beaujolais Nouveau. However, the country's total Beaujolais Nouveau imports are expected to fall by 20 per cent from 2019 to around 3,6 million bottles, amid the ongoing coronavirus pandemic. (Photo by Franck Robichon/EPA/EFE)

A woman rides an electric bicycle on her way as she wears a sunscreen mask towards off strong ultraviolet rays in Fuyang, China on August 14, 2022. The Central Meteorological Observatory of China issued a high-temperature red warning. It is expected that the maximum temperature in some parts of China will reach above 40°C on August 14. (Photo by Sheldon Cooper/SOPA Images/Rex Features/Shutterstock)

Lesley Sutcliffe shelters from the rain next to a life-sized replica of the innermost coffin of King Tutankhamun by artist Amanda Stoner as it goes on display inside a traditional red telephone box which has been converted into museum, in Barnsley, South Yorkshire on Tuesday, November 15, 2022. The piece has been installed as part of Barnsley Museum's plan to showcase culture in unexpected places. (Photo by Danny Lawson/PA Images via Getty Images)

A girl runs as she plays in a fountain at a shopping mall in Beijing, Friday, June 23, 2023. Authorities issued a rare red alert for high temperatures in parts of China's capital on Friday, the highest level of warning, as highs were expected to once again climb to around 40 degrees Celsius (104 degrees Farenheit). (Photo by Mark Schiefelbein/AP Photo)

A woman reacts during the annual tomato fight fiesta called “Tomatina”, tomato fight fiesta, in the village of Bunol near Valencia, Spain, Wednesday, August 30, 2023. Thousands gather in this eastern Spanish town for the annual street tomato battle that leaves the streets and participants drenched in red pulp from 120,000 kilos of tomatoes. (Photo by Alberto Saiz/AP Photo)

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.

Eduardo Salles (Mexico City, 1987) is advertiser, designer, illustrator, writer and professor at the Miami Ad School. And a professional procrastinator!, he says. Ex Creative Director of Nike, Kit Kat and Red Cross Mexico. He has won awards as diverse as Cannes Lions (advertising), Walter Reuters prize (journalism) and Juan Rulfo Short Story Award (literature).