Reference for Kelim 11:8
קַסְדָּא, טְמֵאָה. וּלְחָיַיִם, טְהוֹרִים. אִם יֵשׁ בָּהֶן בֵּית קִבּוּל מַיִם, טְמֵאִים. כָּל כְּלֵי הַמִּלְחָמָה, טְמֵאִים. הַכִּידוֹן, הַנִּיקוֹן, וְהַמַּגָּפַיִן, וְהַשִּׁרְיוֹן, טְמֵאִין. כָּל תַּכְשִׁיטֵי נָשִׁים, טְמֵאִים. עִיר שֶׁל זָהָב, קַטְלָיוֹת, נְזָמִים וְטַבָּעוֹת, וְטַבַּעַת, בֵּין שֶׁיֶּשׁ לָהּ חוֹתָם וּבֵין שֶׁאֵין לָהּ חוֹתָם, נִזְמֵי הָאָף. קַטְלָה שֶׁחֻלְיוֹת שֶׁלָּהּ שֶׁל מַתָּכוֹת בְּחוּט שֶׁל פִּשְׁתָּן אוֹ שֶׁל צֶמֶר, נִפְסַק הַחוּט, הַחֻלְיוֹת טְמֵאוֹת, שֶׁכָּל אַחַת וְאַחַת כְּלִי בִפְנֵי עַצְמָהּ. חוּט שֶׁל מַתָּכוֹת, וְחֻלְיוֹת שֶׁל אֲבָנִים טוֹבוֹת וּמַרְגָּלִיּוֹת, וְשֶׁל זְכוּכִית, נִשְׁתַּבְּרוּ הַחֻלְיוֹת, הַחוּט בִּפְנֵי עַצְמוֹ קַיָּם, טָמֵא. שְׁיָרֵי קַטְלָא, כִּמְלֹא צַוַּאר קְטַנָּה. רַבִּי אֱלִיעֶזֶר אוֹמֵר, אֲפִלּוּ טַבַּעַת אַחַת, טְמֵאָה, שֶׁכֵּן תּוֹלִין בַּצַּוָּאר:
A helmet is susceptible to impurity but the cheek-pieces are not susceptible. But if they have a receptacle for water they are susceptible to impurity. All weapons of war are susceptible to impurity: a javelin, a spear-head, metal boots, and a breastplate are susceptible to impurity. All women's ornaments are susceptible to impurity: a "city of gold" [a kind of tiara], a necklace, earrings, finger-rings, a ring whether it has a seal or does not have a seal, and nose-rings. A necklace which has metal beads on a thread of flax or wool and the thread broke, the beads are still susceptible to impurity, since each one is a vessel in itself. A thread of metal and the beads were of precious stones or pearls or glass, and the beads were broken while the thread alone remained, it is still susceptible to impurity. The remnants of a necklace [are susceptible] as long as there is enough for the neck of a little girl. Rabbi Eliezer says: even if only one ring remained it is susceptible, for they hang it around the neck.