Julia Soaemias, Mother of Elagabalus (218-222 A.D.)
Silver Denarius - 19.19mm, 3.38g
 
Obverse - IVLIA SOAEMIAS AVG
Julia, her draped bust right.
Reverse - VENVS CAELESTIS,
Venus standing left, holding apple and scepter,
a star in the right field..

The image below was photographed by Frank S. Robinson. The image above is my own scan.
Original minted in Rome in 220-222 A.D.

Reference:
Mattingley, Sydenham, & Sutherland, "Roman Imperial Coinage", Volume 4, Part 2 (RIC), p48, nr. 241.
Sear, D.R., "Roman Coins and their Values" (RCV 4th Revised Edition), p217, nr. 2170
Sear, D.R., "Roman Coins and their Values" (RCV Millennium Edition), Vol. 2, p626, nr. 7719, var with star in right field.
Cohen, H, "Descriptions Historique des Monnaies frappees sous l'Empire Romain" (C), Volume 4, p388, nr. 8.
Seaby, H.A. & Sear, D.R., "Roman Silver Coins" (RSC), Volume 3, p126, nr. 8.
Mattingly, Carson & Hill, "Coins of the Roman Empire in the British Museum", Volume 5 (BMC), p536, nr. 45.
Van Meter, D., "Handbook of Roman Imperial Coins" (VM), p210, nr 2/1.
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II),  p392, nr.9 (B3, O1, R6, T7, star in right field)
Suarez, R., "Encyclopedia of Roman Imperial Coins II" (ERIC II-Digital),  p330, nr 9  (B3, O1, R6, T7, star in right field)
Kampmann, U., "Die Münzen der römischen Kaiserzeit", 2nd edition, (Kampmann) p256, nr. 60.7.1.

Quality: about Extra Fine
Rarity: C (Common)