#MinCup24 R3M3: #Rhodochrosite versus #Calcite
Although both are carbonates, rhodochrosite is the pink contender, with specimens reminiscent of raspberry jello or bacon rocks. Calcite can masquerade as fried chicken, cave bacon, pork stone, and fried egg stalagmites, and has over a thousand crystal forms.
Choose!
VOTE: https://www.mineralcup.org/2024/vote/r3m3
⚒️🧪 geology
#MinCup24 R2M7: #Titanite versus #Calcite
This matchup is all about timing.
Titanite's main claim to fame is as an indicator mineral for everything from formation temperature, pressure and chronology. Calcite’s U-Pb dating can help constrain the timing of fault slip, and the minimum age of ancient ocean crusts and volcanic rocks
Time to choose a mineral!
VOTE: https://www.mineralcup.org/2024/vote/r2m7
⚒️🧪 geology
⚒️🧪 geology
#MinCup24 R1 M15: #Calcite versus #Celestine
A component of limestone and seashells, calcite shows off its rhombohedral shape as stunning Iceland spar. Celestine is often sky-blue although it can also be reminiscent of sunsets, overcast skies, and even smoggy days.
VOTE: https://www.mineralcup.org/2024/vote/r1m15
⚒️🧪 geology
