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Ocean Jasper Spherulites

Posted March 13, 2019
by Leo Jahaan
A large chunk of pale yellow inter-connected jasper orbs.

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Rock: Known as ‘Ocean Jasper’, a spherulitic (orbicular) rock discovered only in one remote area of Madagascar. Ocean Jasper is found in a wide variety of colors and forms, most commonly yellow and reddish-pink chalcedony (cryptocrystalline quartz) and an as-yet unidentified green mineral often showing radial crystal formations.
– Field of View: 12 cm (appr.)
– Found: Madagascar (Mahajanga)
Photo: Leo Jahaan

Skeletal Sulphur

Posted May 7, 2019
by Leo Jahaan
sulphur crystal

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Mineral: Sulphur (single crystal, floater).
– Field of View: 4 cm (appr.)
– Found: Bolivia (El Desierto Mine)
Photo: Leo Jahaan

This single sulphur crystal has a skeletal/hoppered form typically found only in the mines of the Bolivian desert. The crystal is translucent so the color changes with backlighting as can be seen in the following photos.

sulphur crystal backlit

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Mineral: Sulphur.
– Field of View: 4 cm (appr.)
Photo: Leo Jahaan

 

sulphur crystal showing hoppered appearance

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Mineral: Sulphur.
– Field of View: 4 cm (appr.)
Photo: Leo Jahaan

 

full-length sulphur crystal, backlit

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Mineral: Sulphur.
– Specimen Size: 7.7 x 4.4 cm (appr.)
Photo: Leo Jahaan

 

full length of floater crystal showing hoppered appearance

Mineral: Sulphur.
– Specimen Size: 7.7 x 4.4 cm (appr.)
Photo: Leo Jahaan

Vanadinite with Baryte

Posted May 9, 2019
by Leo Jahaan
red vanadinite crystals with white baryte dots

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Minerals: Vanadinite, Baryte.
– Field of View: 3 cm (appr.)
– Found: Morocco (Mibladen)
Photo: Leo Jahaan

Ruby, Pyrope & Muscovite

Posted April 19, 2019
by Leo Jahaan
Ruby with striations, etched lines and dots.

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Minerals: Ruby (Corundum), Pyrope (Garnet var. Rhodolite), Muscovite.
– Field of View: 1.5 cm (appr.)
– Found: Madagascar (Zazafotsy)
Photo: Leo Jahaan

This Ruby has particularly interesting natural etching with lines and dots almost looking like a code of sorts.  It is surrounded by patches of red Pyrope on a dark Muscovite matrix.

The locality of Zazafotsy in Madagascar produces fascinating bi-color rubies, which change from a reddish-pink to a rich violet color depending on the source of light (sun / artificial) and angle of viewing. In the photo below you can see the same ruby with a very different color.

 

The violet Ruby from the previous photo is now pink.

Description: Ruby with alternate color depending on light source.
– Field of View: 1.5 cm (appr.)
Photo: Leo Jahaan

 

Rubies and Pyrope on Muscovite.

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Description: 2x Color-changing Rubies, scatterings of Pyrope and a sparkling Muscovite matrix.
– Specimen Size: 7 x 4.5 x 3.5 cm (appr.)
Photo: Leo Jahaan

 

Rear of the specimen with abundant Pyrope.

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Description: This rich red Pyrope is a type of Garnet, complemented here by the Muscovite matrix.
Photo: Leo Jahaan

 

Triangles at the base of the Ruby.

Description: Once again the Ruby from the first photo, in this photo from a different angle a triangular growth form is apparent at it’s base.
Photo: Leo Jahaan