Maria T. Atanasova's Photo Gallery

QRE-UHQAegirine-augite (Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆ , Quartz SiO₂

Goodhouse-Vioolsdrift area, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa

Dimensions: 75 mm x 30 mm x 25 mm
Largest Crystal Size: 75 mm
Weight: 57 g

Dark green sprays of acicular aegirine-augite crystals included in quartz

QRE-UHQAegirine-augite (Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆ , Quartz SiO₂

Goodhouse-Vioolsdrift area, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa

Dimensions: 75 mm x 30 mm x 25 mm
Largest Crystal Size: 75 mm
Weight: 57 g

Dark green masses and sprays of acicular aegirine-augite crystals included in quartz

QRE-UHQAnatase TiO₂ , Quartz SiO₂

Goodhouse-Vioolsdrift area, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa

Dimensions: 75 mm x 30 mm x 25 mm
Largest Crystal Size: 75 mm
Weight: 57 g

Black tetragonal pyramidal crystal on/within green aegirine-augite included quartz

QRE-UHQAnatase TiO₂ , Quartz SiO₂ , Aegirine-augite (Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆

Goodhouse-Vioolsdrift area, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa

Dimensions: 75 mm x 30 mm x 25 mm
Field of View: 23 mm
Weight: 57 g

Black tetragonal pyramidal crystals on/within green aegirine-augite included quartz

QRE-UHQAegirine-augite (Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆ , Quartz SiO₂

Goodhouse-Vioolsdrift area, Nama Khoi Local Municipality, Namakwa District Municipality, Northern Cape, South Africa

Dimensions: 75 mm x 30 mm x 25 mm
Weight: 57 g

Dark green masses and sprays of acicular aegirine-augite crystals included in quartz.

J7D-H48Ancylite-(Ce) CeSr(CO₃)₂(OH)·H₂O , Marcasite FeS₂

Mamelodi Quarry, City of Tshwane Metropolitan Municipality, Gauteng, South Africa

Dimensions: 25 mm x 25 mm x 20 mm
Field of View: 1.00 mm

Doubly terminated ancylite " infested" by tiny tabular marcasite crystals, FOV 1.00 mm. ID for both confirmed by XRD and SEM/EDS analysis by Maria T. Atanasova Specimen and photo late Wolf Windisch.

Pegmatoidal nepheline syenite at Mamelodi Quarry

Mamelodi Quarry, City of Tshwane Metropolitan Municipality, Gauteng, South Africa

Pegmatoidal nepheline syenite at Mamelodi Quarry. Photo 2010

A lamprophyre dyke intruding the Franspoort nepheline syenite

Mamelodi Quarry, City of Tshwane Metropolitan Municipality, Gauteng, South Africa

A lamprophyre dyke intruding the Franspoort nepheline syenite at the south side of the quarry. Photo taken in January 2010.

The nepheline syenite quarry

Mamelodi Quarry, City of Tshwane Metropolitan Municipality, Gauteng, South Africa

A view of the quarry featuring the grey nepheline syenite with an intruding dark-grey lamprophyric dyke. Photo taken January 2010.

XCX-H0PSiderite FeCO₃

Kwaggafontein, Bela-Bela, Bela-Bela Local Municipality, Waterberg District Municipality, Limpopo, South Africa

Dimensions: 25 mm x 25 mm x 20 mm
Field of View: 173 μm

Tightly packed striated siderite crystals; FOV 173 µm. Wolf Windisch specimen. SEM image by Maria T. Atanasova. From Atanasova, Cairncross and Windisch (2016). Microminerals of the Bushveld Complex, South Africa. Council for Geoscience, Pretoria, South Africa.