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The most elaborate Irish brooches are pseudo-penannular, while the Scottish ones mostly retain true penannular forms.<ref>Youngs, 89–90</ref> Most are [[silver-gilt]], the gilding often partial. Some are gilded base metal, of bronze or copper-alloy;<ref>For example, Youngs nos.195 and 75</ref> only one solid gold Irish brooch is known, a 9th-century one from Loughan, [[County Londonderry]], which is less elaborate than most of the series, though the standard of work is very high.<ref>Youngs, no. 83; NMI, 184; [http://www.unc.edu/celtic/catalogue/brooches/derry.html photo]</ref> However, some brooches have a hidden recess which may have contained small lead weights to make the precious metal used seem more valuable than it actually was.<ref>[https://www.britishmuseum.org/explore/highlights/highlight_objects/pe_mla/s/silver_ring_brooch.aspx British Museum], mentioning two examples.</ref>
InDi IrelandIrlandia, theada headpangkal ofjarum theyang pindijadikan mightpusat bedekorasi, turnedadakalanya intodengan amenggunakan focussemacam forlempengan decoration, sometimes using aberbentuk "kitelayang-layang"-shaped plate, suchmisalnya asseperti thatyang onterdapat thepada Kerongsang Tara Brooch; indi ScotlandSkotlandia, thepangkal pin-headsjarum werehanya simpleberupa circleslingkaran formedsederhana byyang bendingdibentuk thedengan pincara backmenekukkan onsalah itselfsatu ujung jarum.<ref>Youngs, 90</ref> ScottishUjung-ujung terminalsgelang arepada morekerongsang oftenSkotlandia distinctlebih lobedsering ordihiasi squarelempengan shapesbundar extendingatau beyondpersegi theyang circlemenjorok ofkeluar thedari ringlingkaran oncincin, bothsementara sides,ujung-ujung whilegelang inpada Irishkerongsang examples,Irlandia thelazimnya terminalsmenjorok typicallyke extenddalam insidelingkaran thecincin ringdan formingmembentuk anotherkuva curvelain, buttetapi nottidak muchbanyak outsidekeluar itdari lingkaran cincin, oratau sometimesadakalanya formmembentuk agaris straightlurus lineyang acrossmelintang thepada interiorbagian ofdalam thelingkaran ringcincin. Irish brooches may only join the two terminals by narrow strips, or not only eliminate the gap entirely, but have a central zone of decoration where the gap between the terminals would have been; the brooches found with the [[Ardagh Chalice]] show both types.<ref>NMI, 245</ref>
[[File:Brit Mus 17sept 016.jpg|thumb|left|Detail of the [[Londesborough Brooch]] (late 8th- or early 9th–century)]]
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