The combined meaning of 15 mm Iced Obsidian and 17 mm Clear Quartz suggests a powerful pairing for grounding, protection, and amplified clarity. 
Here's a breakdown of their individual and combined meanings:
Iced Obsidian:
Emotional Release and Healing: Iced Obsidian can help you delve deep into your emotions, release old wounds and negative patterns, and promote emotional healing.
Protection and Grounding: This obsidian type is a powerful protector against negativity and helps ground your energy, bringing a sense of stability.
Introspection and Transformation: It encourages self-reflection, helps you break negative thought patterns, and supports personal growth. 
Clear Quartz:
Energy Amplification: Clear Quartz is known as the "master healer" and amplifies the energy of other crystals and intentions, making it a versatile tool.
Clarity and Focus: It helps clear mental fog and enhances your ability to concentrate, making it beneficial for decision-making and focus.
Spiritual Connection: Clear Quartz strengthens your connection to the spiritual realm and can enhance meditation practices. 
Combined Meaning:
Enhanced Grounding and Protection: When combined, Clear Quartz amplifies Iced Obsidian's grounding and protective qualities, creating a stronger shield against negativity and helping you feel more stable and secure.
Balanced Emotional Healing: Iced Obsidian helps uncover and release deep-seated emotional issues, while Clear Quartz amplifies its healing properties and supports you in moving forward with greater clarity and focus.
Spiritual Awareness and Clarity: Clear Quartz enhances Iced Obsidian's ability to bring clarity and insight into your inner self and helps you connect with higher realms for guidance and wisdom. 
In short, this combination supports:
Deep emotional healing and release of negative patterns.
Strong grounding and protection against negative energies.
Enhanced mental clarity, focus, and decision-making.
A stronger connection to your spiritual self and higher realms. 
18 cm