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Calcite crystal habit
  
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Jaime_Cerdeira




Joined: 09 Feb 2025
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PostPosted: Feb 23, 2025 14:20    Post subject: Calcite crystal habit  

Dear all,

Can you please help me to identify these crystal habits?

Many thanks!



1 (3).JPG
 Mineral: Calcite
 Locality:
Serra da Arrábida, Setúbal District, Área Metropolitana de Lisboa Region, Portugal
 Description:
 Viewed:  1208 Time(s)

1 (3).JPG



IMG_7388.JPG
 Mineral: Calcite
 Locality:
Serra da Arrábida, Setúbal District, Área Metropolitana de Lisboa Region, Portugal
 Description:
 Viewed:  1209 Time(s)

IMG_7388.JPG



IMG_7381.JPG
 Mineral: Calcite
 Locality:
Serra da Arrábida, Setúbal District, Área Metropolitana de Lisboa Region, Portugal
 Description:
 Viewed:  1208 Time(s)

IMG_7381.JPG


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Pete Richards
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PostPosted: Feb 23, 2025 16:09    Post subject: Re: Calcite crystal habit  

These crystals are rhombohedra.
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Collecting and studying crystals with interesting habits, twinning, and epitaxy
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Jaime_Cerdeira




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PostPosted: Feb 23, 2025 16:14    Post subject: Re: Calcite crystal habit  

Hi Pete,

Thanks a lot!
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Bob Morgan




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PostPosted: Feb 24, 2025 09:47    Post subject: Re: Calcite crystal habit  

They are the unit or cleave rhomb with Miller Index of [10-1,1}.
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