Historia Naturalis

Information about the ALGT certificate: Report number: 821521016 Species: Natural quartz Variety: Rock crystal Shape: Hexagonal prism, polished Dimensions: 96.52 x 27.60 x 20.15 mm Weight: 91.65 grams (excluding the wooden stand) Color: Colorless Transparency: [..]

gr 91,65 W. 27,6 - D. 20,15 - H. 96,52 mm

ALGT Certificate Information: Report Number: 020511017 Species: Natural quartz Variety: Citrine quartz Shape: Sphere, polished Dimensions: 33.18–33.20 mm Weight: 50.74 grams (excluding the wooden mount) Color: Pale yellow Transparency: Transparent Notes: [..]

gr 50,74 W. 33,2 mm

ALGT Gemmological Certificate: Report Number: 020522415 Species: Natural quartz Variety: Citrine quartz Shape: Hexagonal prism, polished Dimensions: 31.95 x 15.17 x 13.31 mm Weight: 13.06 grams Color: Yellow Transparency: Transparent Notes: Citrine quartz [..]

gr 13,06 W. 15,17 - D. 13,31 - H. 31,95 mm

ALGT Certificate Information: Report Number: 620593300 Species: Natural beryl Variety: Aquamarine Shape and Cut: Modified cuboid, polished Dimensions: 54.19 x 17.80 x 15.93 mm Weight: 195.69 carats (~39.14 grams) Color: Deep blue Transparency: Transparent [..]

gr 39 W. 17,8 - D. 15,93 - H. 54,19 mm

Information about the ALGT certificate: Report number: 620501617 Species: Natural beryl Variety: Aquamarine Shape: Rough crystal Dimensions: 85.21 x 72.74 x 40.47 mm Weight: 285.17 grams (excluding the wooden mount) Color: Blue (non-uniform) Transparency: [..]

gr 285,17 W. 72,74 - D. 40,47 - H. 85,21 Cm

CaSO4·2H2O (gesso) o BaSO4 (barite) — aggregato cristallino a rosetta

Largh. 26 - Alt. 41 cm

A small collection of minerals of various sizes

SiO₂ (chalcedony/agate) — fibrous microcrystalline structure

W. 8,5 - D. 3 - H. 11 11

SiO2 — trigonal system (polycrystalline aggregate)

0,477 477 W. 8 - D. 9 - H. 4 cm

Brazil, Ametista do Sul (state of Rio Grande do Sul) (?)

W. 17 - D. 14 cm

Brazil, Ametista do Sul (state of Rio Grande do Sul) (?)

W. 5 - H. 11 cm

SiO₂ (citrine variety) — trigonal system

cm 9,5X8,5

SiO₂ (quartz, trigonal) on KAl₂(AlSi₃O₁₀)(OH)₂ (muscovite, phyllosilicate, monoclinic system)

W. 11 - D. 6 cm

SiO2 —trigonal system

cm 15X11

SiO2 —trigonal system

cm 15X11

SiO2 —trigonal system

cm 15X11

SiO2 —trigonal system

cm 15X11

Al2Si4O10(OH)2 — monoclinic system (phyllosilicate)

W. 11 - D. 8 - H. 9 cm

CaCO3 — orthorhombic system (calcite polymorph)

Cm 7X4X3

CuFeS2 — tetragonal system

Cm 5X4X5

CaSO4·2H2O — monoclinic system (crystalline gypsum variety)

Cm 5X5X6

CaF2 — cubic system

Cm 7X 4X7,5

Sb2S3 — orthorhombic system

Cm 6X4X6

Volcanic rock rich in alkali feldspar (sanidine) — porphyritic, flow-banded texture

W. 4,5 - D. 3,5 - H. 5 Cm

Plagioclase (andesine) + hornblende/biotite — medium- to coarse-grained intrusive igneous rock

Cm 4,5X4,5X7

Ca19(Al,Mg,Fe)13(SiO4)10(Si2O7)4(OH,F,O)10 — sorosilicate, tetragonal system

W. 4 - D. 2,5 - H. 5,5 Cm

SiO₂ (>90%) + accessory lithium minerals (spodumene/lepidolite) — metamorphic rock

Cm 4X2X6

CaSO₄·2H₂O (gypsum) or compact CaCO₃ (calcite) — fine-grained rock/variety

Cm 5X5X6

FeS2 — cubic system

gr 952

CaF2 — cubic system

gr 284 W. 9 - D. 6 cm

CaCO3 — calcium carbonate, trigonal system

LiAlSi4O10 — monoclinic system

Cm 6X5X4,5

SiO₂ (trigonal) + FeS₂ (cubic) — mineralogical association

gr 233 cm 8,5X8

SiO₂ (parallel-band chalcedony) — fibrous microcrystalline structure, trigonal system

20th century

Brazil, Ametista do Sul (state of Rio Grande do Sul) (?)

W. 9 - H. 14 Cm

Three eggs made of amazonite, tourmalinated quartz, chevron amethyst, and a jasper sphere

20th century

20th century

Cm 7X7X33

SiO₂ (chalcedony/microcrystalline quartz, jasper variety) — brecciated microcrystalline structure, trigonal system

Cm 9,9

SiO₂ (chalcedony/microcrystalline quartz) — radial spherulitic structure with druse-like cavities, trigonal system

gr 1590

FeS₂ — cubic system

SiO₂ (microcrystalline quartz/chalcedony) — radial spherulitic structure, trigonal system

gr 527

SiO₂ (amethyst variety) — trigonal system (large, cut specimen)

W. 11 cm

SiO₂ (chalcedony) — fibrous microcrystalline structure, trigonal system

Cu₂CO₃(OH)₂ — monoclinic system

gr 1346

Fe-Ni alloy (kamacite/taenite, cubic system) + olivine (Mg,Fe)₂SiO₄, orthorhombic system — iron-stone meteorite. Comes with a certificate of authenticity. IMCA Certificate #6460

gr 2,39 W. 2 - D. 1,3 Cm

Iron meteorite that fell in Russia in 1947 Certified by IMCA member No. 6758, Meteoriti DC

gr 17,33

Libya, Jabal al Gharbi (discovered in 2018) L6-type chondrite It is sold with a certificate of authenticity from the International Meteorite Collectors Association (IMCA #7379) and the Global Meteorite Association (GMA #G0117)

gr 118,21 W. 5,8 - H. 4,5 Cm

Argentina, approx. 4,800 years old Composition: Iron (Fe) - Nickel (Ni) (?) Only 6% of meteorites that fall to Earth contain iron. Meteorite with certificate of authenticity - Meteoritical Society #6863

gr 56,18

SrSO₄ — strontium sulfate, orthorhombic system

W. 15 - H. 15 cm

Brazil, Ametista do Sul (state of Rio Grande do Sul)

kg 11 H. 34 Cm

SiO₂ — trigonal system

W. 15,5 cm

SiO2 —trigonal system

gr 800 cm 16X12

SiO₂ (citrine variety) — trigonal system

W. 15,17 - D. 13,31 - H. 31,95 mm

BaSO₄ — barium sulfate, orthorhombic system

SiO2 —trigonal system

cm 15X11

FeS2 — cubic system

Cu₂CO₃(OH)₂ — copper hydroxide carbonate, monoclinic system (fibrous-felt-like aggregate)

kg 2,115 W. 19 - D. 11 cm

SiO2 — trigonal system (smoky polycrystalline aggregate)

Cm 5X4X8