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Diadema Oceanicus
Item
Diadema Oceanicus
Roblox
Asset 13722133373by Sideris UGC
Current RAP
175R$
Avg Price (30d)
—
Avg Price (90d)
—
Avg Price (180d)
—
Lowest Price
500R$

resale listing

Original Price
200R$
Total Copies
100
Original Copies Remaining
Sold Out
Summary

Diadema Oceanicus is a Roblox UGC Limited hat by Sideris UGC. Its original stock of 100 copies has sold out. Resale listings start at 500 R$, about 186% above its RAP of 175 R$. RBX Invest has tracked no sales of it in the past 30 days. It was created on Roblox on Jun 11, 2023.

Description

Mare nostrum.

Diadema Oceanicus

Diadema Oceanicus is a Roblox UGC Limited hat by Sideris UGC. Its original stock of 100 copies has sold out. Resale listings start at 500 R$, about 186% above its RAP of 175 R$. RBX Invest has tracked no sales of it in the past 30 days. It was created on Roblox on Jun 11, 2023.

RAP 175 R$
Lowest Price 500 R$
Total Copies 100
Original Copies Remaining Sold Out
Market Cap 17,500 R$
Original Price 200 R$
Item Type UGC Limited
Category Hat
Creator Sideris UGC

How much is Diadema Oceanicus worth? Price and value

As of October 21, 2026, Diadema Oceanicus is worth about 175 Robux, its Recent Average Price (RAP), and the cheapest copy for sale is priced at 500 Robux. Across the 100 owned copies, its estimated market value is 17,500 Robux.

That puts the cheapest copy 186% above RAP. Sellers are holding out for more than the item has recently traded at, which is normal for a UGC Limited with few copies on the market.

How rare is Diadema Oceanicus?

Diadema Oceanicus is a UGC Limited Hat with 100 total copies. It is sold out at the original price, so copies now trade only on the resale market. It originally sold for 200 Robux.

At 175 Robux, RAP sits below the 200 Robux it first sold for, so copies bought at release are currently under water.

Diadema Oceanicus has 46 favorites on the Roblox catalog.

Diadema Oceanicus sales history

RBX Invest has recorded 160 sales of Diadema Oceanicus across 36 trading days, from Jun 16, 2023 to Feb 27, 2026.

Sales here include copies bought from the creator’s original stock as well as resales between players. Free promotional claims are not counted.

Its highest daily average sale price was 397 Robux on Feb 27, 2026, and its lowest was 75 Robux on Jul 18, 2023.

By calendar year, its average sale price went from 194 Robux in 2023 to 397 Robux in 2026, up 105%.

Diadema Oceanicus: average sale price in the 12 most recent months with recorded sales
MonthAverage sale priceSales
Feb 2026397 R$1
Aug 202595 R$1
Apr 2025105 R$1
Mar 202585 R$1
Jan 2025199 R$1
Dec 2024105 R$1
Nov 2024100 R$1
Aug 202475 R$1
Jul 2024350 R$1
Jun 2024173 R$2
Mar 2024190 R$1
Feb 2024192 R$2

Did Diadema Oceanicus make money for release buyers?

Diadema Oceanicus sold out of its original stock 1 day after its first recorded sale, on Jun 17, 2023. Copies could be resold from Jul 16, 2023, once Roblox's 30-day resale lock ended.

Bought at the original 200 Robux, a copy had no profitable resale point in its first year once Roblox's cut is taken out.

About Diadema Oceanicus

Mare nostrum.

How to get Diadema Oceanicus

Diadema Oceanicus is no longer sold by the creator, so the way to get it is to buy a copy from a reseller on Roblox. The cheapest is listed at 500 Robux.

Diadema Oceanicus is Roblox asset ID 13722133373. It was published by Sideris UGC. On RBX Invest it sits in the UGC Limited Hats, Limiteds under 1,000 Copies, Limiteds under 500 R$, Limiteds under 1,000 R$ collections. The RAP, reseller listings, and copy counts on this page refresh from Roblox continuously, so the figures above are the state of the market at the last update rather than a fixed snapshot.