La Sève Cristalline is the practice and creative business of Séverine Boisbourdin, an energy practitioner and maker of vibrational creations. Guided by respect, kindness and non-judgment, Séverine offers appointments drawing on her experience in magnetism, mediumship, lithotherapy, numerology, tarot and related practices. Guidance and energy sessions are available in person or remotely, by telephone or video call. The site also lists training in lithotherapy and other areas.

The online boutique features handmade jewellery and objects incorporating natural stones and crystals. Its range includes bracelets, pendants, geodes, tumbled and raw stones, personalised jewellery, gift boxes and seasonal items. Examples include pieces made with amethyst, malachite, citrine, turquoise and tourmaline, often assembled by hand with cords or wire. The collection also includes decorations, hanging ornaments, candleholders and centrepieces, as well as special-occasion products such as Christmas items and an advent calendar. La Sève Cristalline brings together personal guidance, energy-focused services and distinctive stone-based creations, with appointments available by arrangement.