The Minerals of Slovenia collection covers all deposits that have been discovered in recent times.
The majority of minerals are from the territory of Slovenia and were found in the 1990s and later. This was a time when some Slovenian prospectors found a renewed interest in home soil exploration.
One of the earliest important finds of this period is almost certainly the 1990 discovery of fluorite on the northern slopes of Blegoš. It was Stane Lamovšek from Kranj that uncovered and classified the first samples. Together with prof. dr. Anton Ramovš they published an article in the natural sciences magazine Proteus. 1 Later, dr. Aleksander Rečnik identified some antimony minerals, such as antimonite, valentinite and roméite, 2-6 which placed Blegoš in a fairly uncommon class of antimonite-fluorite ore deposit. So far five important discoveries of fluorite have been made, with crystals up to 4 cm in size. The largest groups of fluorite crystals found measured 20 cm in diameter.
In 1991, Željko Habl discovered an important quartz deposit on the Hrastnik hill near Škofja Loka. Several veins with 10 cm quartz crystals were revealed. 7 The largest groups of quartz crystals found so far measured 40 cm in diameter.
Another uniquely significant site is Gornji Štrihovec near Šentilj, where septarian concretions of exceptional sizes were uncovered in 1994, during the construction of a highway section. In addition to two primary minerals, baryte and calcite, it also contains a range of carbonates, sulphides, claystone and zeolites. This was the first confirmed septarian concretion of these minerals in the world.
Velika Polskava in Pohorje is the first documented site with open-air pegmatite deposits. So far aquamarine, spessartine, microcline and many more were identified.
Dr. Mirjan Žorža and dr. Aleksander Rečnik 12 published a book in 1998 titled Quartz occurrences in Slovenia, which spurred many researchers into searching for new deposits. One such discovery is the arsenopyrite antimonite deposit in Znojile, where dr. Goran Schmidt found quartz crystals of exceptional size, measuring up to 25 cm.
Similar deposits of quartz crystals were found in the vicinity of Haloze. It was Franci Golob that discovered the first samples in the cracks of flint conglomerates from Miocene. It quickly turned out that the area around Haloze is abundant in quartz; it has provided some of the best finds in recent times.
At the turn of the millennium, highway construction was underway at Krumperk near Domžale. Rafael Šerjak noticed a truck full of calcite crystals leaving the construction site and promptly set about tracking down the primary deposit. It turned out to be an interesting find that would almost certainly remain hidden forever, had it not been for the construction works that uncovered it. This site revealed the most morphologically complex calcite crystals, sown along the cracks in Carnian limestone and bituminous clay.
Last but certainly not least, there is the stunning discovery of rutile crystals in the cracks of schistous clay near Krajno Brdo nad Krašnjo. It was discovered by dr. Aleksander Rečnik. In addition to rutile, the site contains siderite, albite, apatite and quartz crystals of exceptional dimensions, the largest one measuring 30 cm and weighing over 15 kg.
In addition to the above, Minerals of Slovenia also includes smaller finds, like quartz sediments from Turjak and Vojsko, pegmatites from Strojna, amethyst from Tinjska gora, and some stunningly beautiful quartz crystals from Zagradišče pri Sostrem. Then there are halites from the Sečovlje salt pans, fourteen pyrites from Krašnja, Polskava and Matajur, baryte from the old lead and zinc mine near Zavrstnik, and many, many more. Minerals of Slovenia is a truly comprehensive collection, excluding only the minerals that come from recently abandoned mines, such as Idrija and Mežica.