Blue Cintamani Silk

Historical references:

Early Medieval Western Europe

First Bible of Charles the Bald, a.k.a. the Vivian Bible, IXth century, Frankish

Golden Psalter of St. Gall, IXth century, Frankish

Early Medieval Eastern Europe

VIII-Xth century, Gilded silver bowl from Salekhard, Russia
source

IX-Xth century, Gilded silver bowl, Konda river, Western Siberia
Likely made in Eastern Europe
source

High Medieval Western Europe

Dijon BM MS.02 Bible, 1126-1150. France

Hortus Deliciarum, 1185. France

Bib. Ste. Genevieve, 1200-1233. France

Bible Moralisee, 1225-1249. France

Arras Missal, XIIIth century, France

Morgan Bible, 1229. France

Maciejowski Bible, 1244-1254. France

Late Medieval Western Europe

BNF Français 342 Lancelot du Lac, 1274. France

Manuscript BNF Français 1581 Roman de Renart, 1275-1300. France

The Golden Haggadah, 1300-1325. Spain

Bible Historiale, 1300-1325. France

Bib. Ste. Genevieve MS.1126 Roman de la Rose, 1350-1360. France

BNCR Vittorio Emanuele 411 Saint Francis – Legenda Maior, 1350-1399. Italy

Lyon BM MS.1351 Breviari d’amor, 1400-1430. France

Main source of illustrations: Manuscript Miniatures