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hrrockguy.bsky.social
Human Resources Professional by day; Mad Scientist the rest of the time. I am passionate about geology in general, petrology, mineralogy and paleontology more specifically. I love lecturing, teaching, exhibiting and writing about the Earth sciences.
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Bronze 1/2 centenionalis of Emperor Flavius Victor, Circa 387- Aug. 28, 388.

submitted 68 days ago • 1 comment

A heavy bronze coin issued by Cleopatra I Thea ("Cleopatra the Goddess") for the reign of Ptolemy VI Philometor. The obverse portrait is the Egyptian goddess Isis. The reverse is the Ptolemaic eagle standard. The Cleopatra we are familiar with is a descendant of this Cleopatra. Circa 180-176 BC.

submitted 87 days ago • 1 comment

Silver penny of King Cnut, 1016-1035AD. Cnut collectively ruled what is referred to as the North Sea Empire. He became King of England in 1016; King of Denmark in 1018; and King of Norway in 1028, ruling all kingdoms until his death in 1035. He was grandson of King Harald Bluetooth of Denmark.

submitted 87 days ago • 0 comments

This is a voided long-cross silver penny of Aethelered II 'The Unready'. As a play on his name, which means 'the well-advised' in Old English, 'unready' actually translates to 'poorly advised' or 'unraed'. He was the longest reigning Anglo-Saxon king of England (978-1013 and 1014-1016 AD).

submitted 91 days ago • 0 comments

'Bad King' John I short-cross silver penny, Circa 1205-1207 AD. This was found by a metal detectorist in a farmer's potato field in Lincolnshire, England. Obv. reads (star) ҺЄHRICVS RЄX. Rev. reads + RAVF • ON • LVNDЄ.

submitted 92 days ago • 0 comments

Short-cross silver penny of 'Good King' Richard I, 'the Lionheart'. Circa 1189-1199 AD. Of course everyone very loosely knows the story. Richard left England to fight in the Crusades. His cousin, John, took Richard's crown and became 'Bad King' John I, spawning the legend of Robin Hood.

submitted 93 days ago • 0 comments

In my quest to acquire every (non-gold) coin of every ruler of England, I've ventured into Norman & Anglo-Saxon coins. This tiny, crummy silver coin, called a sceatta, is actually a very important coin and a super rare example of coinage by the Kings of Northumbria under King Eardwuld, 796-806 AD.

submitted 135 days ago • 0 comments

UK minerals: Calcite [CaCO3]; fluorite [CaF2]; copper [Cu]; and agate [SiO2].

submitted 144 days ago • 1 comment

I'm kind of feeling like at least the next 4 years might be a bad time to get on an airplane in the United States.

submitted 148 days ago • 0 comments

Tanzanian minerals: Tremolite [◻Ca2Mg5(Si8O22)(OH)2]; tanzanite variety zoisite [(CaCa)(AlAlAl)O[Si2O7][SiO4](OH)]; and tourmaline variety chromium dravite [NaMg3Cr3+6(Si6O18)(BO3)3(OH)3(OH)].

submitted 151 days ago • 0 comments

Minerals of South Dakota: Feldspar variety Anorthite [Ca(Al2Si2O8)]; and Calcite [CaCO3].

submitted 152 days ago • 1 comment

South Africa minerals: Calcite and Bultfonteinite on matrix [CaCO3; Ca2(HSiO4)F·H2O]; and inesite [Ca2(Mn,Fe)7Si10O28(OH)2·5H2O].

submitted 160 days ago • 0 comments

Russian minerals: Ferroplatinum [(Pt,Fe)]; murmanite [Na2Ti2(Si2O7)O2 · 2H2O]; and pyrrhotite [Fe1-xS].

submitted 161 days ago • 0 comments

Polish minerals: Calcite with stilbite [CaCO3; M6-7[Al8-9Si27-28O72] · nH2O, where M = either Na, Ca or K]; and calcite [CaCO3].

submitted 167 days ago • 1 comment

submitted 170 days ago • 24 comments

Peru minerals: Rhodochrosite [MnCO3]; epidote [(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)]; and galena cube with realgar, orpiment and quart [PbS].

submitted 173 days ago • 0 comments

Pakistan minerals: Beryl variety aquamarine [Be3Al2Si6O18]; peridot variety forsterite [Mg2SiO4]; brucite [Mg(OH)2]; and beryl variety aquamarine with muscovite [Be3Al2Si6O18 and KAl2(AlSi3O10)(OH)2].

submitted 180 days ago • 0 comments

@bartlebeans.bsky.social

submitted 181 days ago • 0 comments

Oregon minerals: Feldspar variety orthoclase [K(AlSi3O8)]; feldspar variety labradorite 'Oregon sunstone' [(Ca,Na)[Al(Al,Si)Si2O8] with Cu]; agate [SiO2]; and pyrite [FeS2].

submitted 181 days ago • 0 comments

New Mexico minerals: Fluorite [CaF2]; linarite (on quartz) [PbCu(SO4)(OH)2]; quartz [SiO2]; and aragonite [CaCO3].

submitted 183 days ago • 0 comments

Minerals of Nevada: Gold [Au]; turquoise [CuAl6(PO4)4(OH)8 · 4H2O]; ulexite [NaCa[B5O6(OH)6] · 5H2O]; and garnet variety almandine [Fe2+3Al2(SiO4)3].

submitted 184 days ago • 1 comment

Minerals of Namibia: Mimetite [Pb5(AsO4)3Cl]; fluorite [CaF2]; lepidolite [KLi2Al(Si4O10)(F,OH)2 to K(Li1.5Al1.5)(AlSi3O10)(F,OH)2]; and cerussite [PbCO3].

submitted 190 days ago • 0 comments

Minerals of Mozambique: Tourmaline var. watermelon [A(D3)G6(T6O18)(BO3)3X3Z]; and lithian muscovite [KAl2(AlSi3O10)(OH)2].

submitted 194 days ago • 0 comments