v3.25.2
Cover - USD ($)
12 Months Ended
Jun. 30, 2025
Aug. 08, 2025
Cover [Abstract]    
Document Type 10-K  
Amendment Flag false  
Document Annual Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2025  
Document Fiscal Period Focus FY  
Document Fiscal Year Focus 2025  
Current Fiscal Year End Date --06-30  
Entity File Number 001-38349  
Entity Registrant Name GRANITESHARES PLATINUM TRUST  
Entity Central Index Key 0001690842  
Entity Tax Identification Number 82-6644954  
Entity Incorporation, State or Country Code NY  
Entity Address, Address Line One c/o GRANITESHARES LLC  
Entity Address, Address Line Two 222 Broadway – 21st floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10038  
City Area Code 646  
Local Phone Number 876 5096  
Title of 12(b) Security GraniteShares Platinum Shares  
No Trading Symbol Flag true  
Security Exchange Name NYSEArca  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Public Float $ 85,150,000  
Entity Common Stock, Shares Outstanding   700,000
Document Financial Statement Error Correction [Flag] false  
No insider trading flag true  
Auditor Firm ID 445  
Auditor Name TAIT, WELLER & BAKER LLP  
Auditor Location Philadelphia, Pennsylvania