The items featured in this list do not have enough information to justify an article, mainly due to lack of relevance, but are still notable. (Note: Blue buttons link to separate pages)
A bone given to Jolyne by Emporio. He tells her to hold onto the bone; by gripping it tightly, she wakes up from a hallucination caused by Whitesnake. Jotaro says it is the sacrum from an adult female human's pelvis. It appears to have been melted by an acid. Emporio later informs her the bone belonged to his late mother, who was killed by Whitesnake (hence the acid-melted appearance).
The first is a PMFbolt-action sniper rifle Johngalli A. made in prison and disguised as a walking cane. It has a thin body with simplistic stock and a rectangular suppressor on the front of the barrel. Due to the owner's blindness, the rifle lacks a scope. It's unclear if this weapon exists as it was only seen being used by Johngalli A. in the illusion created by Whitesnake.
The other is a pistol (most likely a third-generation Glock 17c) with a rectangular suppressor as well. He uses this pistol whilst disguised as a security guard to truly try assassinating Jolyne and Jotaro. Whitesnake later uses this pistol to kill Johngalli A., framing it as a suicide.
A ghost gun Emporio uses sometimes, first by shooting at cockroaches in his ghost room. Emporio explains it is unable to cause harm, only cause noise. Its bullets can be affected by Kiss, as Emporio uses it in conjunction with Kiss during the battle against Made in Heaven.
Special bracelets emblazoned with the "GD" of Green Dolphin Street Prison. The Like a Virgin (ライク・ア・ヴァージン, Raiku A Vājin) bracelets are special devices attached to the wrists of prisoners going to work on the farms of the prison. Also known as "invisible walls", the bracelets explode if a prisoner strays further than 50 m (160 ft) away from the guard wearing the main bracelet, a violent shock is applied, or if the prisoner tries to take them off. Only the main computer of the prison can unlock them. When the bracelets detect an impact, an alarm will ring from inside of them, alerting the prisoner. During their investigation of the farm and fight against Foo Fighters, Jolyne and Ermes are stuck with these on their wrists, making their battle more difficult.
A cup of water belonging to Foo Fighters, with the word "LARG" written on it. While its owner is occupied with playing catch with a baseball, an inmate tries to drink from it, but is stopped by plankton. Later on, Miraschon sat next to it to provoke and distract F.F. from the baseball game she was playing.
Special identification and entry passes carried by the staff of Green Dolphin Street Prison as well as privileged inmates. Some of the areas of the prisons can only be entered by the pass owners, who identify themselves by slotting their card into a slot connected to a computer at the door. Staff-level entry passes can automatically open doors, but it seems that inmate-level passes can only show the owner's identity, leaving those behind the door free to choose whether they'll allow entrance.
A ghost computer Emporio uses sometimes and brings with him when he escapes the Green Dolphin Street prison. It proved instrumental in defeating Miu Miu when Emporio faxed an image in binary of the chief warden to Jolyne, enabling her to identify Miu Miu with only two memories. It was also crucial in fighting Donatello Versus when Emporio used it to make research on a plane crash in whose memory Jolyne and Ermes were trapped, enabling them to find a way to escape death.
Three small items that Ungalo, Rikiel, and Donatello Versus drop. They are gravitationally attracted to Enrico Pucci. The attraction of these items helps Pucci realize they are children of DIO.
In the manga, the bullet comes from a wound on Versus, whilst the ring and coin's owners are unknown. The anime has the skull ring and nickel come from Rikiel and Ungalo respectively.
A pair of baseball cleats signed by Ichiro. These shoes were donated by Ichiro to a facility for disabled children in 2002 or 2003 as a commemorative gift for his record-breaking performance. If sold to collectors, they'd be worth as much as 10,000 dollars. They were stolen by a thief but were thrown off a building accidentally onto a young Donatello Versus. They were too large for Donatello but he liked how good they smelled and the clacking noises they made when he walked with them, so he kept them. Donatello was eventually arrested as a suspect for stealing them. He was deemed guilty for stealing the shoes and sent to a detention center. Four months later, the actual thief confessed to stealing the shoes.
The anime changed the size of the shoes from 28 cm to 28.5 cm.
A jeweled ring Narciso Anasui has bought in prison so that he could give it to Jolyne and ask her hand in marriage. As Jolyne naps on his shoulder, Anasui tries to slip the ring into her finger. Fortunately, Jolyne is suddenly woken up by Ermes and she tosses the ring at an alligator without thinking.
Ermes Costello would then use her Stand Kiss to create duplicates of the harpoon, removing the sticker to pull herself and Jotaro Kujo towards the space center, then towards Jolyne Cujoh via Jotaro's guidance.
Jotaro throws the spear at Enrico Pucci during stopped time. However, Pucci manages to dodge it in time and it only pierces through his ear. The harpoon's momentum would then launch him towards the optimal direction, where he would achieve Heaven.