Found at Hymnary.org. I have boldfaced the parts that are different from what the Carters sang. Please note that the Carters’ verse 1 is entirely missing from this version.

From the hymnbook The Joy Bells of Canaan: Burning Bush Songs No. 2, edited by Duke M. Farson, Edwin L. Harvey, F. M. Messenger (Waukesha, Wis.: The Metropolitan Church Association, 1905), hymn no. 27.


DIAMONDS IN THE ROUGH
Words by C. W. Byron; music by L. L. Pickett, from “Tears and Triumphs”; ©1897.

1. Ah! many hearts are aching; we find them everywhere,
Whose cups are filled with sorrow, whose homes are filled with care;
When trouble overtakes them, the world gives them a cuff,
Or sends them to perdition, those diamonds in the rough.

CHORUS: The day will soon be over when digging will be done,
And no more gems be gathered, so let us all press on;
When Jesus comes to claim us, and says, “It is enough,”
The diamonds will be shining, no longer in the rough.

2. One day, my precious comrades, you, too, were lost in sin,
When someone sought your rescue, and Jesus took you in;
So when you’re tried and tempted by the scoffer’s keen rebuff,
Remember, O remember, they’re diamonds in the rough. CHORUS

3. O there are many diamonds long buried in the earth,
We pass them by unnoticed, but Jesus knows their worth;
He bids us seek and find them, His message is enough,
He’ll save and sanctify them, those diamonds in the rough. CHORUS

4. There are complaining people who say we are too bold,
And then there are still others who say we’re after gold;
But they are all mistaken, we crave no earthly stuff,
But souls of poor lost sinners, those diamonds in the rough. CHORUS

5. While reading through the Bible, some wondrous sights we see,
We read of Peter, James, and John, by the sea of Galilee;
And when the Master called them, their work was rude enough,
Yet they were precious diamonds he gathered in the rough. CHORUS

6. Now keep your lamps a-burning, the lamps of perfect love,
And unto ev’ry sinner point out the way above;
The precious blood of Jesus was shed, and that’s enough,
Oh, let us tell them of it, those diamonds in the rough. CHORUS