Tests or shells of Baculogypsina (foraminifera genus) look very spectacular. I wrote about them in an article of star sand. However, they are sand grains after the owner of the test dies and like all other sand grains as time goes by they become more and more rounded.
That’s why we usually do not sea Baculogypsina tests as beautifully preserved as are those collected in Hatoma Island, Japan. One often has to dive to collect the most beautiful specimens where waves can not break them.
Beach sand in Bali (Indonesia) contains Baculogypsina tests as well but at first sight they are hardly recognizable. It is really no “star sand” anymore. More appropriate name would probably be “sphere sand”.
Rounded tests of Baculogypsina from Bali, Indonesia. The width of the view is 6 mm.
Foram species Baculogypsina sphaerulata from Hatoma Island, Japan. The width of the view is 15 mm.