So, you work out in the sun all the time, and you are no longer a spring chicken. ERGO, You are Dark Age John.
You got in Germany wonderful Celtic archeological site. At the moment I study them as at around 50 years old I stopped my business and I am student in Art History just for the pleasure.
I lost most of my Summer tan, will work on it soon plus need to make a ton of $$$$ for 2020 coin year Plus enjoy a few cold beer at work....
CONSTANTINOPOLIS COMMEMMORATIVE AE3/4 OBVERSE: CONSTANTINOPOLI, laureate, helmeted & mantled bust left holding scepter REVERSE: Victory standing left, foot on prow with sceptre and leaning on shield, CONS Gamma in ex. Struck at Constantinople, 330-33AD 2.2g, 15mm RIC VII 63 CONSTANTINE II AE Follis OBVERSE: CONSTANTINVS IVN NOB C, laureate head right REVERSE: PROVIDENTIAE CAESS, campgate with two turrets, star above, eSIS(double crescent) in ex. Struck at Siscia 328-29 AD 2.9g, 20mm RIC VII 216
These are all from an early RR hoard that appeared on the market some years back, mostly sold through Gorny & Mosch. It was never published or even publicly described as a hoard, but the existence of this hoard is unmistakable once you've seen the coins. I'm reasonably confident that this is not collection toning, but rather the way the coins looked shortly after 2000 years of dirt and encrustation was expertly removed; examples of so-called fundpatina. (@Fugio1 Your new H quinarius is from the same hoard.) Phil Davis
I've got a couple of darker coins here to share. The last one isn't ancient by any means but it was made crudely and shows dark patina like this. Unidentified AE Judaea coin Silver Massa Shailendra Dynasty of the Mataram Kingdom Central Java, present-day Indonesia Issued circa 850-900 CE 2.15 grams AE Fals Zangid Dynasty of Syria Issued under As-Salif Ismail al-Malik 1178 CE (574 AH) 3.85 grams - 23mm 20 Cash Kingdom of Mysore Present-day India Issued under Krishnaraja Wadiyar III 1811-1833 CE
Here are a couple of dark coins featuring Tyche: Phoenicia. Sidon 52 BC-AD 43. Seleucis and Pieria. Antioch circa 100-0 BC.
Dark coins with contrasting light earthen deposits: Troas. Gergis 400-241 BC. Phrygia. Apameia circa 100-50 BC. Seleukid Kingdom. Antioch. Tryphon 142-138 BC.
Like Carl's above, here is a Faustina I "temple" sestertius with sand patina in areas that make the black patina easier to see - I wish my black ones all had such contrast: A Constans II follis that's just black: