- gemsminerals Ltd
- Address:Bregalniza 2
- Krissi2007
- Address:makedonia, shumen, shumen, Bulgaria
- Terradrill Fluids Ltd
- Address:Tzar Osvoboditel 76G
- Kaolin Jsco
- Address:7 Sheynovo, Sofia, Bulgaria
- Wolff & Mueller Minerals Bulgaria OOD
- Address:Zlaten rog, Sofia, Bulgaria
- Quartz silica sands Sofia Ltd.
- Address:Sveti Spas 26
- Devnya Cement AD
- Address:Industrial Zone
- dolomitebg
- Address:tzaritsa Joana
- Magstroy Ltd
- Address:
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