Carved fossils and minerals represent a fascinating intersection of natural beauty and human craftsmanship, where geological wonders are transformed into intricate works of art. These pieces can take various forms, ranging from bowls and…
Calcium carbonate is a chemical compound with the chemical formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite, most notably in chalk and limestone, eggshells, gastropod shells, shellfish skeletons…
The seemingly rapid appearance of fossils in the "Primordial Strata" was noted by William Buckland in the 1840s. [16 ] Charles Darwin in his 1859 book On the Origin of Species discussed the then inexplicable lack of earlier fossils as one…
Ukázka přírodního krystalického zlata z lokality v Guelmim v provincii Tata v Maroku. Toto nově objevené ložisko (rok 2022) poskytlo ... Při nákupu nad 3 000 Kč poštovné zdarma!
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V dnešní době už tato striktní pravidla chápeme trošku volněji a pojmem drahokam je často označován každý "vzácný a drahý" kámen, který našel využití v kombinaci se zlatem a vzácnými kovy pro výrobu šperků a podobných předmětů.