Mirabilia Naturalia

Live auction 575

Mirabilia Naturalia

tue 22 February 2022
Milan
SINGLE SESSION 22/02/2022 Hours 15:00
A collection of extraordinary natural elements from private collections
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Viewing in Milan from friday 18 to Monday 21, 10am to 6pm
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Price range from 0 € to 38000 €
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121 - 180  of 211 LOTS
€ 3.500,00 / 4.000,00
Estimate
122
Ferrous meteorite, made up for the most part of an iron and nickel alloy.

kg 18,3 W. 25 - H. 24 Cm
€ 9.000,00 / 9.500,00
Estimate
123
A brass mechanism created to launch a siderite, which is a meteorite containing iron.

gr 10 W. 12 - D. 8 - H. 37 Cm
€ 400,00 / 500,00
Estimate
124
Sandstone concretion of pure siliceous sand, two gogottes H 14 cm and one H 13 cm including base
€ 250,00 / 280,00
Estimate
125
Sandstone concretion of pure siliceous sand, H 18 cm and H 15 cm including base
€ 180,00 / 220,00
Estimate
126
Amethysts varying in size, H 14 cm and 12 cm including base. Amethyst is a violet variety of quartz, often combined with subalkaline basaltic rocks.
€ 150,00 / 180,00
Estimate
127
Opaque and colourful variety of quartz.

H. 25 Cm
€ 500,00 / 600,00
Estimate
128
Rhodonite mineral on a metal base. The massive mineral is flesh-pink in colour with black speckles due to the presence of manganese hydrated oxides.

H. 31 Cm
€ 600,00 / 800,00
Estimate
129
Dendritic agate, a variety of calchedony, on a metal base

H. 25 Cm
€ 350,00 / 400,00
Estimate
130
This "speckled stone" is a sedimentary monomineralic rock, meaning that it is formed of only one mineral, that is made up of quartz and often includes impurities.

H. 16 Cm
€ 300,00 / 400,00
Estimate
131
A medium-sized labradorite on a black base. It is a variety of anortite with colours ranging from green to blue, used in jewelry-making.

H. 18 Cm
€ 250,00 / 300,00
Estimate
132
A medium-sized labradorite on a black base. It is a variety of anortite with colours ranging from green to blue, used in jewelry-making.

W. 12 - H. 11 Cm
€ 200,00 / 250,00
Estimate
133
Septaria on a black metal base. A concretion of marly or argillaceous limestones containing angular cavities or cracks. These cracks (septaria) can be radiating or concentric and are often filled by the cementation of calcite and barite crystals.

H. 31 Cm
€ 500,00 / 600,00
Estimate
134
A block of lapis on a metal base

H. 24 Cm
€ 400,00 / 600,00
Estimate
€ 300,00 / 400,00
Estimate
€ 200,00 / 300,00
Estimate
€ 550,00 / 650,00
Estimate
138
Polished malachite (irregular mineral)

kg 23 W. 46 - D. 27 - H. 10 Cm
€ 2.500,00 / 2.800,00
Estimate
139
Tabajaran mine, on a Corten base

W. 46 - H. 52 cm
€ 1.800,00 / 2.200,00
Estimate
140
A slice of Brasilian agate with iridescent blueish colours covered in red haematite with a double crystal heart

W. 27 - D. 7,5 - H. 20 Cm
€ 300,00 / 350,00
Estimate
141
Formed from a stalagmite that was created inside a cavity rich in copper minerals, that give it its look and colours.
€ 1.000,00 / 1.200,00
Estimate
142
This dark, blue-green piece comes from a South African mineral: Tiger eye.

W. 12 - D. 12 - H. 52,5 Cm
€ 800,00 / 1.000,00
Estimate
143
A slice of red jasper from an area that is rich in iron oxide.

kg 1,8 W. 27 - D. 12 - H. 42 Cm
€ 800,00 / 1.000,00
Estimate
144
Tabajaran mine on a Corten base. Agate, a variety of calchedony, has a typical zoned structure that is visible to the naked eye thanks to the differences in colour.

W. 32 - D. 11 - H. 61 Cm
€ 1.600,00 / 1.900,00
Estimate
145
A series of 7 agate slices on cubical brass stands. Together, they recreate the patterns of this Brasilian stone.

W. 9,5 - D. 18 - H. 13 Cm
€ 350,00 / 450,00
Estimate
146
Tabajaran mine, agate with a hole in the centre, on a Corten base

W. 20 - D. 25 - H. 55 Cm
€ 1.500,00 / 1.800,00
Estimate
147
Rock crystal, also known as hyaline quartz, is the "ultimate" crystal: clear and transparent, able to break down white light into the colours of the rainbow.

W. 43 - D. 30 - H. 14 Cm
€ 3.800,00 / 4.200,00
Estimate
148
Characterised by large crystals varying in colour from almost-clear white (at the roots) to purple at the tips of the crystals.

W. 30 - D. 34 - H. 16 Cm
€ 2.800,00 / 3.000,00
Estimate
149
Amethyst is a stone in the macrocrystalline quartz group. The largest extractions are made in Brasil.

W. 22 - D. 21 - H. 24 Cm
€ 1.700,00 / 1.900,00
Estimate
150
Three cubical pyrite crystals from the famous mines in Spain. Pyrite is a mineral made up of iron disulfide, with a yellow-gold colour and a metallic shine.

W. 12,5 - D. 8,5 - H. 16 Cm
€ 1.200,00 / 1.400,00
Estimate
151
A sedimentary formation that is common in desert areas. Its colours range from orange to ochre yellow and it is a cluster of gypsum crystals that is formed under very specific environmental and climatic conditions. This specimen is particularly large. [..]

W. 50 - D. 42 - H. 23 Cm
€ 1.500,00 / 1.800,00
Estimate
152
Interlocking cubes, easily extracted from the Marna basin where they were formed 130 million years ago. The cubes in this extraordinary specimen are particularly large.

W. 21 - D. 15 - H. 27 Cm
€ 4.000,00 / 4.500,00
Estimate
153
A tree branch that fell on the banks of the lake during the winter. Australia's many lakes are rich in sulphates, which create the perfect conditions for the cristallisation and formation of alites, gypsum and alunites.

W. 34 - D. 34 - H. 48 Cm
€ 2.000,00 / 2.200,00
Estimate
154
Originating from a single cristallisation, extraordinary in size.

W. 25 - D. 25 - H. 39,5 Cm
€ 1.500,00 / 1.700,00
Estimate
155
A beautiful purple octahedron in the shape of a double pyramid. This cristallisation is made in the lab through the evaporation of alum and chrome.

W. 21 - D. 15 - H. 27,5 Cm
€ 800,00 / 1.000,00
Estimate
€ 1.500,00 / 1.800,00
Estimate
€ 1.000,00 / 1.200,00
Estimate
158
Smoky rock crystal

W. 26,5 - H. 16 cm
€ 800,00 / 1.000,00
Estimate
159
Rock crystal or hyaline quartz has a clear, ferrous colour with many inclusions.

W. 21 - H. 15,5 cm
€ 300,00 / 350,00
Estimate
160
Rock crystal bowls

W. 11 cm
€ 200,00 / 250,00
Estimate
161
A copper carbonate mineral that can take on many shades of green. The ashtray is in good conditions.

W. 17 - D. 17 - H. 16 Cm
€ 300,00 / 350,00
Estimate
162
Good conditions, with a peculiar shape and the typical colours of this mineral

H. 21 Cm
€ 300,00 / 350,00
Estimate
163
A monomineralic sedimentary rock, composed of quartz and often including impurities, usually of iron compounds that give the rock its bright colours.

H. 39 cm
€ 300,00 / 350,00
Estimate
164
kg 13,9 W. 38 - D. 34 - H. 17 Cm
€ 1.800,00 / 2.000,00
Estimate
165
kg 12,18 W. 36 - D. 33 - H. 16 Cm
€ 1.800,00 / 2.000,00
Estimate
166
Quartz on a wood and brass base

W. 31 - H. 27 Cm
€ 300,00 / 400,00
Estimate
€ 150,00 / 200,00
Estimate
168
Cloudy alabaster with red coral details

W. 20 - D. 8 - H. 3 Cm
€ 350,00 / 450,00
Estimate
169
W. 19 - H. 7 Cm
€ 450,00 / 700,00
Estimate
170
W. 19 - D. 15,7 - H. 5 Cm
€ 500,00 / 800,00
Estimate
171
Silver bowl with amber knobs

W. 20 - D. 5,5 - H. 7 Cm
€ 300,00 / 400,00
Estimate
172
W. 13 - H. 4,6 Cm
€ 400,00 / 600,00
Estimate
€ 700,00 / 900,00
Estimate
€ 1.500,00 / 1.700,00
Estimate
€ 500,00 / 600,00
Estimate
€ 600,00 / 800,00
Estimate
€ 500,00 / 600,00
Estimate
€ 500,00 / 600,00
Estimate
€ 500,00 / 600,00
Estimate
€ 600,00 / 800,00
Estimate
121 - 180  of 211 LOTS