Treading the line of ruby and sapphire — Umba Valley (Tanzania) sapphire, untreated, 1.5ct, designed and cut by me4yr ⋅ trebliganna ⋅ r/MineralPorn
Color zoning in heated Montana sapphires (Potentate Mine, Rock Creek)4yr ⋅ trebliganna ⋅ r/MineralPorn
A party of parti sapphires. All Australian parti sapphires I’ve cut this year 🎉4yr ⋅ trebliganna ⋅ r/Lapidary
The almost matched pair. Pink Nigerian tourmaline, 8.0x6.3mm, 2.68ctw, eye clean, cut on-the-fly in my own design. $625 (shipping included within US)4yr ⋅ trebliganna ⋅ r/Shinypreciousgems
