Celestine (also known as celestite) is the primary natural source of strontium, a mineral composed mainly of strontium sulfate (SrSO₄). At Rezvan Mines we supply both run-of-mine Celestine ore and processed Celestine Concentrate, upgraded through crushing, washing and gravity separation to increase SrSO₄ content and reduce gangue.
Celestine Concentrate is the feedstock behind strontium carbonate production, permanent ferrite magnets, specialty glass and ceramics, red-flame pyrotechnics, and a range of strontium chemicals. Because downstream processes such as black-ash conversion are sensitive to barium, calcium and silica levels, grade consistency matters more than a single headline number — and that consistency is what we deliver shipment after shipment.
| Property | Celestine Concentrate | Celestine (Raw Ore) |
|---|---|---|
| Chemical formula | SrSO₄ | SrSO₄ |
| Typical grade | 85% min SrSO₄ | [__]% min SrSO₄ |
| Product form | Powder & granules | Lump / run-of-mine |
| Colour | Light grey to pale blue | Grey to pale blue |
| Specific gravity | ~3.9–4.0 | ~3.9–4.0 |
| Mohs hardness | 3.0–3.5 | 3.0–3.5 |
| Moisture | [__]% max |
[__]% max |
| Packaging | Jumbo bags, 25/50 kg bags, or bulk | Bulk |
| Origin | Semnan region, Iran | Semnan region, Iran |
Typical chemical analysis — [BaSO₄ __%, CaO __%, Fe₂O₃ __%, SiO₂ __%, LOI __%]. A lab analysis certificate accompanies every shipment.
Tell us your target SrSO₄ grade, particle size, monthly tonnage and destination port, and we will send pricing, a typical analysis and a lead time. Trial containers are welcome before larger contracts.
