Summary of tektites

Ordered by age. Bediasites Georgiaites Urengoy tektites Moldavites Ivorites and microivorites Irghizite and microirghizites Australites Indomalaysianite, Malaysianite Indomalaysianite, Malaysianite Billitonite Philippinite Indochinite Thailandite Bediasite Color: Black non-transparent (brown shine through thin plate). Deposit: North America – about then Texas Counties in an area of over 7,000 square miles (18,000 km2). 1st discovery / description Age…

Noble-gas mass spectrometer for K-Ar dating

Tektites dating – determining the age of moldavites

Potassium–argon dating (K–Ar) method It is suitable as tectites (natural glass) usually contain quite high amount of potassium (including radioactive potassium 40). The amount of potassium is determined by mass spectometer. In the same way the amount of argon 40 can be measured. The date of origin of  natural glass can be calculated from the…

34DSCF9775

34DSCF9775 – Certificate

Certificate number: 34DSCF9775 Weight: 35.8ct Dimensions: 28 x 22 x 7 mm Locality: Chlum Shape: Natural piece Quality: A Special attributes: – Very glossy, Color: Brown green, Rare moldavite, Date: 7. 11. 2019          

Certified Modlavite 34DSCF9424

34DSCF9424 – Certificate

Certificate number: 34DSCF9424 Weight: 129.95ct Dimensions: 56 x 43 x 9 mm Locality: Nova Hospoda Shape: Natural piece Quality: A Special attributes: Shiny, Color: Bottle green, two kinds of sculptation, Date: 18. 8. 2019            

Origin of the Moldavite name

     The name “Czech emerald” originates from the times of rule of the emperor Rudolf II. and it was coined by his royal doctor and biologist (1609).      The scientific world came to know moldavites on 2 December 1786 at a meeting of The Royal Czech Society of Sciences. Professor Josef Mayer gave a lecture…

The largest moldavites

The largest moldavites have been found in Moravian localities. The biggest one weighs over 265g. Based on findings of big fragments we can suppose that the whole stones (primary shapes of moldavites) weighed up to 500g. The largest Bohemian moldavites Weight [g – gram] Weight [ct – carat] Locality 142.5 712.5 Radomilice 137.0 685.0 Stoh…