I want some Jeweler that holds some spells?

Contingency Jewelry, minor Item 14

Consumable Magical Abjuration
Price 900 gp
Usage wear as jewelry
Activate  envision; Trigger An action occurs that you specify; 

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This device is custom built to look like regular jewelry, but it also contains a matrix to hold a spell. Any spell caster can cast any spell of 4th level or lower into the device and specify the conditions that will result in the spell being cast and if they spell will affect the wearer or if it just centered on the wearer. Upon being dispelled, the jewelry falls apart and disintegrates into dust. This spell can prevent things like death if this spell would heal the target.

Contingency Jewelry Item 16

Consumable Magical Abjuration
Price 2,000 gp
Usage wear as jewelry
Activate  envision; Trigger An action occurs that you specify; 

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As contingency Jewelry minor, but the spell can be up to level 6th.

Contingency Jewelry, major Item 18

Consumable Magical Abjuration
Price 5,000 gp
Usage wear as jewelry
Activate  envision; Trigger An action occurs that you specify; 

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As contingency Jewelry minor, but the spell can be up to level 7th.

Contingency Jewelry, epic Item 20

Consumable Magical Abjuration
Price 14,000 gp
Usage wear as jewelry
Activate  envision; Trigger An action occurs that you specify; 

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As contingency Jewelry minor, but the spell can be up to level 8th.

Thoughts?