وَقَدْ يَكُونُ عَنْ غَيْرِ مِقْدَارٍ، نَحْوُ: «هَذَا خَاتَمٌ حَدِيدًا، وَسِوَارٌ ذَهَبًا».
Translation: Tamyīz may also occur without a number or measure, as in: “This is an iron ring and a gold bracelet.”
The question is not “how much?” but “made of what?”. Ḥadīdan and dhahaban identify the material.