[SunkenCiv]

I wholeheartedly agree. The ancientnavigation keyword has a number of topics pertaining (at least in part) to both Roman and Byzantine trade, both of which were widespread. These two links are to topic postings that have 100 chrono-sorted topics from that keyword:

• Silver in ancient Egyptian bracelets provides earliest evidence for long-distance trade between Egypt and Greece [06/05/2023]
• Shell beads discovery sheds light on Stone Age seafaring [05/30/2023]

[SunkenCiv]

The more recent ancientnavigation keyword additions, sorted:

• LEGENDS OF NORSE SETTLERS DROVE DENMARK TOWARDS GREENLAND [07/12/2023]
• Pendants made from giant sloths suggest earlier arrival of people in the Americas [07/12/2023]
• Did Ancient Phoenicia Really Exist? [07/04/2023]
• 135-yr-old National Geographic magazine lays off its last 19 staff writers, may go off newsstands [06/29/2023]
• Medieval gaming piece with runic inscription discovered in Norway [06/27/2023]
• Asians in early America [06/27/2023]
• 4,000-Year-Old Stonehenge-like Sanctuary Unearthed in the Netherlands [06/22/2023]
• Irish Origins | The Genetic History of Ireland [06/21/2023]
• Seeking the origin of Indigenous languages in South America [06/20/2023]
• Divers Are About to Pull a 3,000-Year-Old Shipwreck From the Depths [Croatia] [06/18/2023]
• 86,000-Year-Old Human Remains Uncovered, Challenging Dominant Migration Hypothesis [06/14/2023]
• Three historical shipwrecks uncovered in the Mediterranean [06/12/2023]
• Northwest African Neolithic initiated by migrants from Iberia and Levant [06/12/2023]
• Why the Earliest Alaskans Didn't Eat Fish for 1,000 Years [06/10/2023]
• The U.S. Is Giving Away Lighthouses for Free [06/09/2023]
• 2,700-year-old petroglyphs depicting people, ships and animals discovered in Sweden [06/09/2023]
• Ancient Discovery In Greece May Completely Rewrite The Human Story [06/07/2023]
• Ancient tombs point to rich families from wealthy Cypriot community [06/11/2022]
• Turks Enraged as Ancestry.com Reveals the Truth: Most of Them Are Greeks [06/13/2021]
• Ancient 'untouched' tomb discovered on Dingle Peninsula [Bronze Age, County Kerry, Ireland] [04/20/2021]
• Ancient Irish DNA reveals incredible secrets, including Down Syndrome [09/06/2020]
• Archaeologists uncover 5,700-year-old Neolithic house in north Cork [09/01/2020]
• Archaeologists Find Evidence of Incest Among Irelands Early Elite at Newgrange Passage Tomb [06/22/2020]
• Tartessian, Europe's newest and oldest Celtic language [06/24/2019]
• Ancient bird bones redate human activity in Madagascar by 6,000 years [8500 BC] [09/15/2018]
• 5,000 year old DNA reveals the surprising origins of the Irish [11/23/2017]
• 500 year-old shipwreck loaded with gold found in Namibian desert [06/07/2016]
• A man's discovery of bones under his pub could forever change what we know about the Irish [03/21/2016]
• First ancient Irish human genomes sequenced [01/01/2016]
• Scientists sequence first ancient Irish human genomes [Book of Invasions] [12/28/2015]
• Ancient artefacts at Tullaghoge [Ireland, 5000 BC] [02/19/2015]
• Viking warriors and treasures are buried beneath Dublin [08/02/2014]
• Ancient graffiti proves Spain's Irish links [07/26/2014]
• Laois 'bog body' said to be world's oldest [08/23/2013]
• Human occupation of Madagascar pushed back 2500 years [08/16/2013]
• Blood of the Irish: DNA Proves Ancestry of the People of Ireland [07/13/2013]
• Snails Reveal Ancient Human Migration from France to Ireland [06/23/2013]
• Genes show one big European family [05/09/2013]
• Scottish people's DNA study could 'rewrite nation's history' [08/22/2012]
• Welsh people could be most ancient in UK, DNA suggests [06/20/2012]
• Gene Study Shows Ties Long Veiled in Europe [repost] [06/16/2010]
• Archeology: When did the First Settlers Come to Iceland? [the Irish] [04/17/2010]
• Clues to ancient invasion in DNA [ Scotland, Ireland, Picts, Vikings ] [04/06/2009]
• Myths Of British Ancestry [09/28/2007]
• When Irish Genes Are Smiling [03/07/2007]
• A United Kingdom? Maybe [03/05/2007]
• We're nearly all Celts under the skin [In Great Britain] [09/23/2006]
• The scale and nature of Viking settlement in Ireland from Y-chromosome admixture analysis [09/10/2006]
• Medieval Irish warlord boasts three million descendants [01/19/2006]
• Up to three million men descended from medieval Irish warlord: study [01/19/2006]
• Scientists discover most fertile Irish male [01/18/2006]
• Scientist Discover Most Fertile Irish Male [01/17/2006]
• Scientists discover most fertile Irish male [01/17/2006]
• Irish History Takes a Paternity Test [12/27/2005]
• Studies Prove People Of Madagascar Came From Borneo And Africa [07/10/2005]
• Blood Type History, Human Migrations (Blam Thread) [07/03/2005]
• DNA Shows Celtic Hero Somerled's Viking Roots [04/26/2005]
• Split Between English and Scots Older Than Thought [07/18/2004]
• Split Between English and Scots Older Than Thought [04/11/2004]
• Y Chromosomes Sketch New Outline of British History [05/27/2003]
• An Ancient Link To Africa Lives On In Bay Of Bengal [12/10/2002]
• Who Were The Celts? [09/26/2002]
• English And Welsh Are Races Apart [07/04/2002]
• A new day surfaces for deep sea archaeology [06/28/2002]

[Texan5]

It looks more like a hair ornament to me-maybe to put around a bun, or like a little tiara...